/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/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 20:20:59,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 20:20:59,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 20:20:59,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 20:20:59,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 20:20:59,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 20:20:59,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 20:20:59,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 20:20:59,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 20:20:59,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 20:20:59,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 20:20:59,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 20:20:59,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 20:20:59,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 20:20:59,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 20:20:59,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 20:20:59,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 20:20:59,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 20:20:59,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 20:20:59,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 20:20:59,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 20:20:59,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 20:20:59,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 20:20:59,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 20:20:59,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 20:20:59,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 20:20:59,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 20:20:59,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 20:20:59,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 20:20:59,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 20:20:59,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 20:20:59,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 20:20:59,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 20:20:59,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 20:20:59,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 20:20:59,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 20:20:59,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 20:20:59,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 20:20:59,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 20:20:59,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 20:20:59,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 20:20:59,410 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 20:20:59,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 20:20:59,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 20:20:59,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 20:20:59,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 20:20:59,454 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 20:20:59,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 20:20:59,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 20:20:59,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 20:20:59,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 20:20:59,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 20:20:59,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 20:20:59,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 20:20:59,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 20:20:59,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 20:20:59,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 20:20:59,457 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 20:20:59,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 20:20:59,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 20:20:59,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 20:20:59,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 20:20:59,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 20:20:59,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 20:20:59,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 20:20:59,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 20:20:59,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 20:20:59,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 20:20:59,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 20:20:59,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 20:20:59,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 20:20:59,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 20:20:59,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 20:20:59,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 20:20:59,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 20:20:59,762 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 20:20:59,762 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-15 20:20:59,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a8059ac0/d4c2b894ac5d43279d832f6c6d279a68/FLAG444321c35 [2020-10-15 20:21:00,381 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 20:21:00,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-15 20:21:00,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a8059ac0/d4c2b894ac5d43279d832f6c6d279a68/FLAG444321c35 [2020-10-15 20:21:00,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a8059ac0/d4c2b894ac5d43279d832f6c6d279a68 [2020-10-15 20:21:00,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 20:21:00,749 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 20:21:00,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 20:21:00,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 20:21:00,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 20:21:00,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@636f67d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00, skipping insertion in model container [2020-10-15 20:21:00,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 20:21:00,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 20:21:01,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:21:01,293 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 20:21:01,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:21:01,415 INFO L208 MainTranslator]: Completed translation [2020-10-15 20:21:01,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01 WrapperNode [2020-10-15 20:21:01,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 20:21:01,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 20:21:01,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 20:21:01,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 20:21:01,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (1/1) ... [2020-10-15 20:21:01,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (1/1) ... [2020-10-15 20:21:01,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 20:21:01,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 20:21:01,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 20:21:01,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 20:21:01,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (1/1) ... [2020-10-15 20:21:01,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (1/1) ... [2020-10-15 20:21:01,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (1/1) ... [2020-10-15 20:21:01,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (1/1) ... [2020-10-15 20:21:01,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (1/1) ... [2020-10-15 20:21:01,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (1/1) ... [2020-10-15 20:21:01,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (1/1) ... [2020-10-15 20:21:01,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 20:21:01,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 20:21:01,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 20:21:01,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 20:21:01,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (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 20:21:01,568 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 20:21:01,568 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 20:21:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 20:21:01,569 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 20:21:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 20:21:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 20:21:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 20:21:01,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 20:21:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 20:21:01,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 20:21:01,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 20:21:01,572 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 20:21:01,898 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 20:21:01,898 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 20:21:01,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:01 BoogieIcfgContainer [2020-10-15 20:21:01,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 20:21:01,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 20:21:01,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 20:21:01,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 20:21:01,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:21:00" (1/3) ... [2020-10-15 20:21:01,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e8971d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:01, skipping insertion in model container [2020-10-15 20:21:01,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:01" (2/3) ... [2020-10-15 20:21:01,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e8971d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:01, skipping insertion in model container [2020-10-15 20:21:01,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:01" (3/3) ... [2020-10-15 20:21:01,910 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-10-15 20:21:01,922 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 20:21:01,922 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 20:21:01,931 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 20:21:01,932 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 20:21:01,961 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,961 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,961 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,962 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,962 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,963 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,963 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,963 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,964 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,964 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,964 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,965 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,965 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,965 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,966 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,967 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,967 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,967 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,968 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,969 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,970 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,970 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,975 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,976 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,976 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,977 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,982 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,983 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,983 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,983 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,983 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:01,984 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:02,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 20:21:02,026 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 20:21:02,027 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 20:21:02,027 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 20:21:02,027 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 20:21:02,027 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 20:21:02,027 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 20:21:02,028 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 20:21:02,028 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 20:21:02,041 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 20:21:02,043 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:02,047 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:02,049 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:02,090 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-15 20:21:02,090 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 20:21:02,096 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-15 20:21:02,098 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-15 20:21:03,342 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-15 20:21:03,342 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-15 20:21:03,349 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 20:21:03,362 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 20:21:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 20:21:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 20:21:03,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:03,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 20:21:03,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-15 20:21:03,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:03,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82933445] [2020-10-15 20:21:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:03,616 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 20:21:03,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82933445] [2020-10-15 20:21:03,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:03,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 20:21:03,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526975142] [2020-10-15 20:21:03,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 20:21:03,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:03,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 20:21:03,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 20:21:03,642 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 20:21:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:03,716 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-15 20:21:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 20:21:03,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 20:21:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:03,730 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:21:03,730 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 20:21:03,732 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 20:21:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 20:21:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 20:21:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-15 20:21:03,771 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-15 20:21:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:03,771 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-15 20:21:03,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 20:21:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-15 20:21:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 20:21:03,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:03,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:03,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 20:21:03,773 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:03,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-15 20:21:03,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:03,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617702840] [2020-10-15 20:21:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:03,890 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 20:21:03,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617702840] [2020-10-15 20:21:03,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:03,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 20:21:03,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554841739] [2020-10-15 20:21:03,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 20:21:03,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:03,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 20:21:03,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 20:21:03,894 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-15 20:21:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:03,925 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-15 20:21:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 20:21:03,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 20:21:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:03,927 INFO L225 Difference]: With dead ends: 56 [2020-10-15 20:21:03,927 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:03,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-15 20:21:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-15 20:21:03,936 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-15 20:21:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:03,937 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-15 20:21:03,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 20:21:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-15 20:21:03,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:03,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:03,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:03,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 20:21:03,939 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:03,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-15 20:21:03,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:03,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505871793] [2020-10-15 20:21:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,009 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 20:21:04,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505871793] [2020-10-15 20:21:04,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:04,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:04,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929384755] [2020-10-15 20:21:04,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:04,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:04,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:04,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:04,012 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-15 20:21:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:04,092 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-15 20:21:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:04,093 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:04,095 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:04,095 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:04,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-15 20:21:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:04,105 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-15 20:21:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:04,105 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:04,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:04,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:04,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:04,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 20:21:04,107 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:04,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-15 20:21:04,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:04,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054605373] [2020-10-15 20:21:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,167 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 20:21:04,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054605373] [2020-10-15 20:21:04,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:04,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:04,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845321537] [2020-10-15 20:21:04,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:04,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:04,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:04,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:04,170 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-15 20:21:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:04,256 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:21:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:21:04,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:04,258 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:04,258 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:21:04,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:04,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:21:04,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:21:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:21:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-15 20:21:04,263 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-15 20:21:04,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:04,264 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-15 20:21:04,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:04,264 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-15 20:21:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:04,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:04,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:04,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 20:21:04,265 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-15 20:21:04,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:04,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894996465] [2020-10-15 20:21:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,320 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 20:21:04,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894996465] [2020-10-15 20:21:04,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:04,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:04,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723363207] [2020-10-15 20:21:04,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:04,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:04,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:04,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:04,322 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-15 20:21:04,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:04,388 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-15 20:21:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:21:04,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:04,390 INFO L225 Difference]: With dead ends: 57 [2020-10-15 20:21:04,390 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 20:21:04,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 20:21:04,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-15 20:21:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:21:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:21:04,395 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-15 20:21:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:04,396 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:21:04,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:21:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:04,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:04,397 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:04,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 20:21:04,397 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:04,398 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-15 20:21:04,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:04,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466375417] [2020-10-15 20:21:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,470 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 20:21:04,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466375417] [2020-10-15 20:21:04,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285533341] [2020-10-15 20:21:04,471 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 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 20:21:04,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:04,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:04,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:04,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:04,602 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 20:21:04,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:04,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:04,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087884284] [2020-10-15 20:21:04,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:04,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:04,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:04,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:04,604 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-15 20:21:04,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:04,707 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-15 20:21:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:04,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:04,709 INFO L225 Difference]: With dead ends: 48 [2020-10-15 20:21:04,709 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:21:04,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:21:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:21:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:21:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-15 20:21:04,713 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-15 20:21:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:04,714 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-15 20:21:04,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-15 20:21:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:04,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:04,715 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:04,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 20:21:04,925 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:04,926 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-15 20:21:04,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:04,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135285569] [2020-10-15 20:21:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,992 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 20:21:04,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135285569] [2020-10-15 20:21:04,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489112969] [2020-10-15 20:21:04,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:21:05,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:05,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:05,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:05,058 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 20:21:05,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:05,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:21:05,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941152121] [2020-10-15 20:21:05,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:21:05,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:05,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:21:05,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:21:05,061 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-15 20:21:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:05,122 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:21:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:05,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:21:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:05,123 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:05,123 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 20:21:05,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 20:21:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-15 20:21:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-15 20:21:05,128 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-15 20:21:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:05,129 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-15 20:21:05,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:21:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-15 20:21:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:05,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:05,130 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:05,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:05,342 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:05,343 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-15 20:21:05,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:05,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979148994] [2020-10-15 20:21:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:05,398 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 20:21:05,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979148994] [2020-10-15 20:21:05,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891895143] [2020-10-15 20:21:05,398 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 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 20:21:05,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:21:05,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:05,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:05,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:05,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:05,492 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 20:21:05,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:05,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:05,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893880870] [2020-10-15 20:21:05,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:05,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:05,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:05,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:05,494 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-15 20:21:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:05,622 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-15 20:21:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 20:21:05,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:05,624 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:21:05,624 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 20:21:05,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 20:21:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 20:21:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:21:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:21:05,629 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-15 20:21:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:05,629 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:21:05,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:21:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:05,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:05,630 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:05,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:05,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:05,841 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-15 20:21:05,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:05,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352556060] [2020-10-15 20:21:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:05,928 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 20:21:05,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352556060] [2020-10-15 20:21:05,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394463022] [2020-10-15 20:21:05,929 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 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 20:21:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:05,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:05,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:05,998 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 20:21:05,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:05,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:21:05,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902445288] [2020-10-15 20:21:05,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:21:05,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:06,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:21:06,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:21:06,000 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-15 20:21:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:06,130 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:21:06,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:06,131 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:21:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:06,132 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:06,132 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:06,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-15 20:21:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-15 20:21:06,142 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-15 20:21:06,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:06,144 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-15 20:21:06,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:21:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-15 20:21:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:06,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:06,145 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:06,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:06,357 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:06,358 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-15 20:21:06,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:06,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347269361] [2020-10-15 20:21:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:06,407 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 20:21:06,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347269361] [2020-10-15 20:21:06,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85809300] [2020-10-15 20:21:06,408 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 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 20:21:06,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:06,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:06,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:06,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:06,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:06,516 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 20:21:06,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:06,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:06,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275211787] [2020-10-15 20:21:06,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:06,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:06,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:06,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:06,518 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-15 20:21:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:06,701 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-15 20:21:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:06,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:06,702 INFO L225 Difference]: With dead ends: 62 [2020-10-15 20:21:06,702 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:06,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-15 20:21:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 20:21:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-15 20:21:06,711 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-15 20:21:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:06,711 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-15 20:21:06,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-15 20:21:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:06,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:06,714 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:06,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 20:21:06,915 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-15 20:21:06,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:06,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638446088] [2020-10-15 20:21:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:06,978 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 20:21:06,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638446088] [2020-10-15 20:21:06,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745329994] [2020-10-15 20:21:06,979 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 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 20:21:07,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 20:21:07,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:07,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:07,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:07,058 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 20:21:07,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:07,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:07,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88624903] [2020-10-15 20:21:07,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:07,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:07,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:07,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:07,060 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-15 20:21:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:07,177 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-15 20:21:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:07,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:07,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:07,178 INFO L225 Difference]: With dead ends: 64 [2020-10-15 20:21:07,179 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 20:21:07,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 20:21:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-15 20:21:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:21:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-15 20:21:07,186 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-15 20:21:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:07,186 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-15 20:21:07,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-15 20:21:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:07,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:07,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:07,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:07,403 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:07,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-15 20:21:07,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:07,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217527435] [2020-10-15 20:21:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:07,462 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 20:21:07,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217527435] [2020-10-15 20:21:07,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917552662] [2020-10-15 20:21:07,463 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 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 20:21:07,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:07,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:07,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:07,536 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 20:21:07,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:07,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:07,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029777056] [2020-10-15 20:21:07,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:07,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:07,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:07,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:07,538 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-15 20:21:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:07,700 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-15 20:21:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:07,700 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:07,701 INFO L225 Difference]: With dead ends: 61 [2020-10-15 20:21:07,701 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:07,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:07,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-15 20:21:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:07,705 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-15 20:21:07,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:07,705 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:07,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:07,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:07,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:07,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:07,909 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:07,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-15 20:21:07,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:07,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114426389] [2020-10-15 20:21:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:07,959 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 20:21:07,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114426389] [2020-10-15 20:21:07,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648151424] [2020-10-15 20:21:07,960 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 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 20:21:08,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:08,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:08,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:08,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:08,030 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 20:21:08,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:08,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:08,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868661903] [2020-10-15 20:21:08,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:08,032 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-15 20:21:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:08,186 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:21:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:08,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:08,188 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:08,188 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:08,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-15 20:21:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:21:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-15 20:21:08,193 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-15 20:21:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:08,194 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-15 20:21:08,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-15 20:21:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:08,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:08,195 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:08,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 20:21:08,408 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:08,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-15 20:21:08,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:08,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241524449] [2020-10-15 20:21:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:08,489 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 20:21:08,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241524449] [2020-10-15 20:21:08,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231556620] [2020-10-15 20:21:08,490 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 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 20:21:08,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:21:08,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:08,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:08,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:08,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:08,562 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 20:21:08,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:08,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:08,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71725850] [2020-10-15 20:21:08,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:08,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:08,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:08,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:08,564 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-15 20:21:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:08,795 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-15 20:21:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:08,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:08,797 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:21:08,797 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:08,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:21:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-15 20:21:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 20:21:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-15 20:21:08,801 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-15 20:21:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:08,801 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-15 20:21:08,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-15 20:21:08,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:08,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:08,806 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:09,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:09,007 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:09,008 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-15 20:21:09,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:09,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788253563] [2020-10-15 20:21:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:09,059 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 20:21:09,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788253563] [2020-10-15 20:21:09,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173046807] [2020-10-15 20:21:09,061 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 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 20:21:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:09,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:09,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:09,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:09,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:09,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312509018] [2020-10-15 20:21:09,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:09,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:09,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:09,156 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-15 20:21:09,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:09,343 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-15 20:21:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:09,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:09,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:09,344 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:09,345 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:09,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:21:09,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-15 20:21:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:09,348 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-15 20:21:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:09,349 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:09,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:09,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:09,350 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:09,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 20:21:09,561 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:09,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-15 20:21:09,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:09,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556511615] [2020-10-15 20:21:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:09,628 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 20:21:09,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556511615] [2020-10-15 20:21:09,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595244649] [2020-10-15 20:21:09,629 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 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 20:21:09,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:09,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:09,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:09,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:09,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:09,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:09,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:09,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682200767] [2020-10-15 20:21:09,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:09,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:09,741 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-15 20:21:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:09,922 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-15 20:21:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:09,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:09,923 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:09,923 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 20:21:09,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:21:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 20:21:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-15 20:21:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 20:21:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-15 20:21:09,932 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-15 20:21:09,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:09,932 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-15 20:21:09,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-15 20:21:09,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:09,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:09,933 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:10,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 20:21:10,134 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:10,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-15 20:21:10,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:10,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940415289] [2020-10-15 20:21:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:10,200 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 20:21:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940415289] [2020-10-15 20:21:10,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125057385] [2020-10-15 20:21:10,201 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 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 20:21:10,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:10,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:10,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:10,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:10,275 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 20:21:10,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:10,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213721154] [2020-10-15 20:21:10,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:10,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:10,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:10,277 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-15 20:21:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:10,367 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-15 20:21:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:10,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:10,368 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:10,368 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:10,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-15 20:21:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-15 20:21:10,372 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-15 20:21:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:10,372 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-15 20:21:10,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-15 20:21:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:10,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:10,395 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:10,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 20:21:10,602 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:10,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:10,603 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-15 20:21:10,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:10,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808065359] [2020-10-15 20:21:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:10,675 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 20:21:10,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808065359] [2020-10-15 20:21:10,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132431178] [2020-10-15 20:21:10,676 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 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 20:21:10,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:10,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:10,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:10,765 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 20:21:10,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:10,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:10,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128694036] [2020-10-15 20:21:10,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:10,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:10,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:10,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:10,767 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-15 20:21:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:10,895 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-15 20:21:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:10,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:10,896 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:10,896 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:10,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 20:21:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:10,901 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-15 20:21:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:10,901 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:10,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:10,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:10,902 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:11,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 20:21:11,113 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-15 20:21:11,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:11,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604680384] [2020-10-15 20:21:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:11,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604680384] [2020-10-15 20:21:11,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735198825] [2020-10-15 20:21:11,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:21:11,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:11,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:11,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:11,245 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 20:21:11,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:11,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:11,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204035442] [2020-10-15 20:21:11,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:11,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:11,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:11,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:11,247 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-15 20:21:11,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:11,402 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-15 20:21:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:11,403 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:11,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:11,403 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:11,403 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:11,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:11,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-15 20:21:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 20:21:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-15 20:21:11,408 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-15 20:21:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:11,408 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-15 20:21:11,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-15 20:21:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:11,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:11,411 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:11,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:11,620 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-15 20:21:11,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:11,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981027570] [2020-10-15 20:21:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:11,682 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 20:21:11,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981027570] [2020-10-15 20:21:11,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639503421] [2020-10-15 20:21:11,683 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 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 20:21:11,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:11,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:11,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:11,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:11,775 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 20:21:11,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:11,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:11,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683511387] [2020-10-15 20:21:11,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:11,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:11,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:11,777 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-15 20:21:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:11,960 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-15 20:21:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:11,961 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:11,962 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:11,962 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:11,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:21:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-15 20:21:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:11,966 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-15 20:21:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:11,967 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:11,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:11,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:11,968 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:12,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:12,168 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-15 20:21:12,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:12,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106501568] [2020-10-15 20:21:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:12,218 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 20:21:12,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106501568] [2020-10-15 20:21:12,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644343298] [2020-10-15 20:21:12,218 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 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 20:21:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:12,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:12,272 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 20:21:12,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:12,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:12,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139847737] [2020-10-15 20:21:12,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:12,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:12,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:12,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:12,276 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-15 20:21:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:12,497 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:21:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:12,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:12,499 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:21:12,499 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:21:12,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:21:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:21:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-15 20:21:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-15 20:21:12,503 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-15 20:21:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:12,504 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-15 20:21:12,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-15 20:21:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:12,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:12,505 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:12,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:12,718 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-15 20:21:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:12,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738737469] [2020-10-15 20:21:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:12,772 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 20:21:12,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738737469] [2020-10-15 20:21:12,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890644411] [2020-10-15 20:21:12,773 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 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 20:21:12,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:12,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:12,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:12,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:12,852 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 20:21:12,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:12,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:12,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378321411] [2020-10-15 20:21:12,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:12,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:12,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:12,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:12,854 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-15 20:21:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:13,112 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-15 20:21:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:13,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:13,115 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:13,115 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:13,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-15 20:21:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:21:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-15 20:21:13,118 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-15 20:21:13,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:13,118 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-15 20:21:13,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-15 20:21:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:13,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:13,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:13,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 20:21:13,323 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:13,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:13,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-15 20:21:13,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:13,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081090510] [2020-10-15 20:21:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:13,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081090510] [2020-10-15 20:21:13,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432342378] [2020-10-15 20:21:13,400 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 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 20:21:13,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:13,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:13,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:13,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:13,457 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 20:21:13,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:13,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:13,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757037945] [2020-10-15 20:21:13,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:13,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:13,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:13,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:13,459 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-15 20:21:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:13,595 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-15 20:21:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:13,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:13,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:13,596 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:13,596 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:13,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-15 20:21:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:13,600 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:13,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:13,600 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:13,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:13,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:13,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:13,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 20:21:13,810 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:13,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:13,810 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-15 20:21:13,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:13,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927657485] [2020-10-15 20:21:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:13,876 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 20:21:13,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927657485] [2020-10-15 20:21:13,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140116089] [2020-10-15 20:21:13,877 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 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 20:21:13,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:13,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:13,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:13,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:13,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111414387] [2020-10-15 20:21:13,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:13,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:13,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:13,954 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:14,152 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-15 20:21:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:14,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:14,153 INFO L225 Difference]: With dead ends: 71 [2020-10-15 20:21:14,153 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 20:21:14,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:21:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 20:21:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-15 20:21:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:14,158 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:14,158 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:14,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:14,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:14,159 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:14,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 20:21:14,362 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:14,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:14,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-15 20:21:14,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:14,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325231148] [2020-10-15 20:21:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:14,440 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 20:21:14,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325231148] [2020-10-15 20:21:14,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815323512] [2020-10-15 20:21:14,440 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 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 20:21:14,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:14,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:14,514 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 20:21:14,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:14,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:14,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246085258] [2020-10-15 20:21:14,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:14,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:14,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:14,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:14,516 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:14,688 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-15 20:21:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:14,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:14,694 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:14,694 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 20:21:14,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:21:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 20:21:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-15 20:21:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:14,697 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:14,698 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:14,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:14,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:14,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:14,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 20:21:14,906 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:14,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:14,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-15 20:21:14,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:14,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008671593] [2020-10-15 20:21:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:14,964 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 20:21:14,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008671593] [2020-10-15 20:21:14,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591632966] [2020-10-15 20:21:14,964 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 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 20:21:15,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:15,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:15,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:15,044 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 20:21:15,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:15,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:15,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286111388] [2020-10-15 20:21:15,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:15,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:15,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:15,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:15,047 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:15,317 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-15 20:21:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:15,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:15,318 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:15,318 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:15,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:21:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-15 20:21:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:15,322 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:15,322 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:15,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:15,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:15,323 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:15,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 20:21:15,524 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:15,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-15 20:21:15,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:15,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597996924] [2020-10-15 20:21:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:15,593 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 20:21:15,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597996924] [2020-10-15 20:21:15,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868364364] [2020-10-15 20:21:15,594 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 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 20:21:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:15,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:15,652 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 20:21:15,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:15,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:15,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455599322] [2020-10-15 20:21:15,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:15,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:15,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:15,654 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:15,859 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:21:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:15,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:15,861 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:15,861 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:15,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-15 20:21:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-15 20:21:15,864 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-15 20:21:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:15,865 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-15 20:21:15,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-15 20:21:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:15,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:15,866 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:16,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:16,076 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:16,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-15 20:21:16,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:16,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290319880] [2020-10-15 20:21:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:16,145 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 20:21:16,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290319880] [2020-10-15 20:21:16,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588028314] [2020-10-15 20:21:16,146 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 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 20:21:16,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:16,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:16,213 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 20:21:16,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:16,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:16,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813131743] [2020-10-15 20:21:16,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:16,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:16,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:16,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:16,215 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-15 20:21:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:16,468 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-15 20:21:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:16,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:16,469 INFO L225 Difference]: With dead ends: 62 [2020-10-15 20:21:16,469 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:16,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:21:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-15 20:21:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 20:21:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-15 20:21:16,472 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-15 20:21:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:16,472 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-15 20:21:16,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-15 20:21:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:16,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:16,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:16,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 20:21:16,682 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:16,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-15 20:21:16,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:16,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652578575] [2020-10-15 20:21:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:16,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652578575] [2020-10-15 20:21:16,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583063456] [2020-10-15 20:21:16,738 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 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 20:21:16,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:16,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:16,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:16,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:16,803 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 20:21:16,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:16,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:16,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809325485] [2020-10-15 20:21:16,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:16,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:16,805 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-15 20:21:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:17,060 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-15 20:21:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:17,061 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:17,061 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:17,062 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:17,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-15 20:21:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:21:17,066 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-15 20:21:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:17,067 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:21:17,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:21:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:17,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:17,067 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:17,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 20:21:17,268 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:17,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:17,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-15 20:21:17,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:17,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639752242] [2020-10-15 20:21:17,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:17,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639752242] [2020-10-15 20:21:17,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004505125] [2020-10-15 20:21:17,343 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 20:21:17,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:17,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:17,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:17,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:17,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:17,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:17,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308388376] [2020-10-15 20:21:17,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:17,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:17,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:17,418 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-15 20:21:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:17,727 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-15 20:21:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:17,728 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:17,729 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:17,729 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:17,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-15 20:21:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-15 20:21:17,733 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-15 20:21:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:17,734 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-15 20:21:17,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-15 20:21:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:17,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:17,735 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:17,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:17,940 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:17,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-15 20:21:17,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:17,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928513291] [2020-10-15 20:21:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:18,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928513291] [2020-10-15 20:21:18,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279181078] [2020-10-15 20:21:18,031 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 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 20:21:18,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:18,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:18,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:18,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:18,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:18,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840621042] [2020-10-15 20:21:18,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:18,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:18,090 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-15 20:21:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:18,233 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-15 20:21:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:18,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:18,235 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:18,235 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:18,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:21:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-15 20:21:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-15 20:21:18,238 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-15 20:21:18,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:18,238 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-15 20:21:18,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-15 20:21:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:18,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:18,239 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:18,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:18,447 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-15 20:21:18,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:18,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459893624] [2020-10-15 20:21:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:18,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459893624] [2020-10-15 20:21:18,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297460256] [2020-10-15 20:21:18,584 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 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 20:21:18,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:18,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:18,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:18,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:18,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382627985] [2020-10-15 20:21:18,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:18,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:18,706 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-15 20:21:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:18,934 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-15 20:21:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:18,935 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:18,936 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:18,936 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:18,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:21:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-15 20:21:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:21:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-15 20:21:18,942 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-15 20:21:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:18,943 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-15 20:21:18,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-15 20:21:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:18,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:18,944 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:19,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 20:21:19,156 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-15 20:21:19,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:19,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176262767] [2020-10-15 20:21:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:19,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176262767] [2020-10-15 20:21:19,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942057036] [2020-10-15 20:21:19,234 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 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 20:21:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:19,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:19,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:19,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:19,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:19,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951261193] [2020-10-15 20:21:19,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:19,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:19,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:19,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:19,293 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-15 20:21:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:19,497 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-15 20:21:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:19,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:19,498 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:21:19,498 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:21:19,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:21:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-15 20:21:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:19,502 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-15 20:21:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:19,503 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:19,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:19,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:19,503 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:19,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:19,707 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:19,707 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-15 20:21:19,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:19,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235237166] [2020-10-15 20:21:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:19,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235237166] [2020-10-15 20:21:19,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772428621] [2020-10-15 20:21:19,787 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 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 20:21:19,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:19,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:19,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:19,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:19,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:19,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:19,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378692385] [2020-10-15 20:21:19,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:19,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:19,859 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-15 20:21:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:20,100 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-15 20:21:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:20,101 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:20,102 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:20,102 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:20,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:21:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-15 20:21:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:20,106 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-15 20:21:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:20,106 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:20,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:20,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:20,107 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:20,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 20:21:20,308 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:20,308 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-15 20:21:20,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:20,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066263672] [2020-10-15 20:21:20,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:20,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066263672] [2020-10-15 20:21:20,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182424497] [2020-10-15 20:21:20,400 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 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 20:21:20,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:20,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:20,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:20,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:20,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116228616] [2020-10-15 20:21:20,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:20,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:20,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:20,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:20,503 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-15 20:21:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:20,729 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-15 20:21:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:20,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:20,731 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:20,731 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:20,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:20,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-15 20:21:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 20:21:20,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-15 20:21:20,735 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-15 20:21:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:20,736 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-15 20:21:20,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-15 20:21:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:20,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:20,737 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:20,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:20,949 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:20,950 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-15 20:21:20,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:20,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640030285] [2020-10-15 20:21:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:21,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640030285] [2020-10-15 20:21:21,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250927941] [2020-10-15 20:21:21,076 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 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 20:21:21,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:21,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:21,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:21,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:21,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:21,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287348121] [2020-10-15 20:21:21,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:21,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:21,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:21,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:21,185 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-15 20:21:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:21,583 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-15 20:21:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:21,583 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:21,585 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:21,585 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 20:21:21,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 20:21:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-15 20:21:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:21:21,589 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-15 20:21:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:21,590 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:21:21,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:21:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:21,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:21,591 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:21,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 20:21:21,802 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-15 20:21:21,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:21,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972096695] [2020-10-15 20:21:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:21,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972096695] [2020-10-15 20:21:21,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904973421] [2020-10-15 20:21:21,880 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 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 20:21:21,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:21,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:21,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:21,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:21,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:21,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538137743] [2020-10-15 20:21:21,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:21,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:21,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:21,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:21,978 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-15 20:21:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:22,339 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-15 20:21:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:22,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:22,342 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:21:22,342 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:21:22,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:21:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:21:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-15 20:21:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-15 20:21:22,347 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-15 20:21:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:22,347 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-15 20:21:22,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-15 20:21:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:22,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:22,348 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:22,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 20:21:22,560 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:22,561 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-15 20:21:22,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:22,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352159928] [2020-10-15 20:21:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:22,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352159928] [2020-10-15 20:21:22,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419405059] [2020-10-15 20:21:22,642 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 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 20:21:22,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:22,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:22,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:22,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:22,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:22,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955242174] [2020-10-15 20:21:22,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:22,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:22,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:22,719 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-15 20:21:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:23,096 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-15 20:21:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:23,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:23,098 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:23,098 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:21:23,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:21:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-15 20:21:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:21:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-15 20:21:23,102 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-15 20:21:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:23,102 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-15 20:21:23,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-15 20:21:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:23,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:23,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:23,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 20:21:23,306 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:23,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:23,306 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-15 20:21:23,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:23,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783686405] [2020-10-15 20:21:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:23,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783686405] [2020-10-15 20:21:23,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549844250] [2020-10-15 20:21:23,408 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 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 20:21:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:23,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:23,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:23,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:23,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648788308] [2020-10-15 20:21:23,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:23,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:23,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:23,458 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-15 20:21:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:23,629 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 20:21:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:23,629 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:23,631 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:23,631 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:23,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-15 20:21:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:23,635 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:23,635 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:23,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:23,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:23,636 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:23,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 20:21:23,845 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:23,846 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-15 20:21:23,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:23,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389751510] [2020-10-15 20:21:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:23,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389751510] [2020-10-15 20:21:23,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356762892] [2020-10-15 20:21:23,945 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 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 20:21:23,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:23,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:24,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:24,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:24,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:24,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189952084] [2020-10-15 20:21:24,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:24,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:24,043 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:21:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:24,279 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-15 20:21:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:24,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:24,280 INFO L225 Difference]: With dead ends: 81 [2020-10-15 20:21:24,281 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 20:21:24,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 20:21:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-15 20:21:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:24,284 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:21:24,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:24,284 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:24,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:24,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:24,285 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:24,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 20:21:24,486 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:24,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-15 20:21:24,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:24,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832540050] [2020-10-15 20:21:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:24,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832540050] [2020-10-15 20:21:24,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360596559] [2020-10-15 20:21:24,575 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 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 20:21:24,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:24,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:24,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:24,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:24,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:24,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747309493] [2020-10-15 20:21:24,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:24,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:24,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:24,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:24,636 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:21:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:24,846 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:21:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:24,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:24,850 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:24,850 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:24,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:21:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-15 20:21:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:24,852 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:24,853 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:24,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:24,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:24,853 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:25,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 20:21:25,062 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:25,062 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-15 20:21:25,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:25,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379125185] [2020-10-15 20:21:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379125185] [2020-10-15 20:21:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254379919] [2020-10-15 20:21:25,158 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 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 20:21:25,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:25,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:25,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:25,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:25,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:25,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:25,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:25,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416544640] [2020-10-15 20:21:25,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:25,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:25,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:25,254 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:21:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:25,536 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:21:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:25,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:25,538 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:25,538 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:25,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:21:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-15 20:21:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:25,542 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:21:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:25,542 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:25,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:25,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:25,543 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:25,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 20:21:25,752 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-15 20:21:25,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:25,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640909104] [2020-10-15 20:21:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:25,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640909104] [2020-10-15 20:21:25,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376156421] [2020-10-15 20:21:25,845 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 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 20:21:25,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:25,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:25,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:25,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:25,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:25,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:25,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230513304] [2020-10-15 20:21:25,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:25,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:25,910 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:21:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:26,169 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-15 20:21:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:26,169 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:26,170 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:26,170 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:26,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-15 20:21:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:26,173 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:26,173 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:26,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:26,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:26,174 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:26,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:26,376 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:26,377 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-15 20:21:26,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:26,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968918991] [2020-10-15 20:21:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:26,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968918991] [2020-10-15 20:21:26,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478372002] [2020-10-15 20:21:26,461 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 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 20:21:26,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:26,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:26,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:26,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:26,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:26,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:26,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:26,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754846601] [2020-10-15 20:21:26,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:26,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:26,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:26,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:26,551 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:21:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:26,919 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-15 20:21:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:26,921 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:26,922 INFO L225 Difference]: With dead ends: 73 [2020-10-15 20:21:26,922 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 20:21:26,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:21:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 20:21:26,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-15 20:21:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:26,925 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:21:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:26,925 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:26,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:26,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:26,926 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:27,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 20:21:27,137 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:27,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:27,137 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-15 20:21:27,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:27,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831333964] [2020-10-15 20:21:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:27,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831333964] [2020-10-15 20:21:27,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324728301] [2020-10-15 20:21:27,218 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 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 20:21:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:27,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:27,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:27,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800059112] [2020-10-15 20:21:27,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:27,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:27,293 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:21:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:27,573 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 20:21:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:27,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:27,574 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:21:27,575 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:21:27,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:21:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-15 20:21:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:21:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-15 20:21:27,579 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-15 20:21:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:27,579 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-15 20:21:27,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-15 20:21:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:27,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:27,580 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:27,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:27,785 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:27,785 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-15 20:21:27,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:27,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702387678] [2020-10-15 20:21:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702387678] [2020-10-15 20:21:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267178662] [2020-10-15 20:21:27,860 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 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 20:21:27,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:27,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:27,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:27,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:27,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:27,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:27,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690777129] [2020-10-15 20:21:27,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:27,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:27,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:27,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:27,939 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-15 20:21:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:28,338 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-15 20:21:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:28,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:28,340 INFO L225 Difference]: With dead ends: 70 [2020-10-15 20:21:28,340 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 20:21:28,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:21:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 20:21:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-15 20:21:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:21:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-15 20:21:28,344 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-15 20:21:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:28,344 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-15 20:21:28,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-15 20:21:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:28,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:28,345 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:28,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 20:21:28,545 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-15 20:21:28,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:28,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319027216] [2020-10-15 20:21:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:28,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319027216] [2020-10-15 20:21:28,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224003388] [2020-10-15 20:21:28,615 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 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 20:21:28,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:28,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:28,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:28,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:28,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:28,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:28,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:28,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994732544] [2020-10-15 20:21:28,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:28,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:28,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:28,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:28,689 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-15 20:21:29,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:29,067 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-15 20:21:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:29,068 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:29,069 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:29,069 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:29,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:21:29,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-15 20:21:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:21:29,073 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-15 20:21:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:29,074 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:21:29,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:21:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:29,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:29,074 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:29,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:29,283 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:29,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-15 20:21:29,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:29,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97196194] [2020-10-15 20:21:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97196194] [2020-10-15 20:21:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011462172] [2020-10-15 20:21:29,370 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 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 20:21:29,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:29,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:29,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:29,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:29,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:29,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:29,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:29,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870476039] [2020-10-15 20:21:29,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:29,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:29,463 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-15 20:21:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:29,871 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-15 20:21:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:29,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:29,873 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:29,873 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:29,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:29,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-15 20:21:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-15 20:21:29,876 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-15 20:21:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:29,876 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-15 20:21:29,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-15 20:21:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:29,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:29,877 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:30,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 20:21:30,077 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:30,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-15 20:21:30,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:30,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85760276] [2020-10-15 20:21:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:30,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85760276] [2020-10-15 20:21:30,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536998908] [2020-10-15 20:21:30,180 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 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 20:21:30,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:30,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:30,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:30,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:30,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086115601] [2020-10-15 20:21:30,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:30,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:30,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:30,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:30,239 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-15 20:21:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:30,410 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-15 20:21:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:30,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:30,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:30,411 INFO L225 Difference]: With dead ends: 72 [2020-10-15 20:21:30,412 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 20:21:30,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:21:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 20:21:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-15 20:21:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-15 20:21:30,416 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-15 20:21:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:30,416 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-15 20:21:30,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:30,416 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-15 20:21:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:30,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:30,417 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:30,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 20:21:30,618 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:30,618 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-15 20:21:30,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:30,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059078872] [2020-10-15 20:21:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059078872] [2020-10-15 20:21:30,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284648119] [2020-10-15 20:21:30,732 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 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 20:21:30,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:30,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:30,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:30,795 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:30,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:30,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:30,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850448400] [2020-10-15 20:21:30,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:30,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:30,806 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-15 20:21:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:31,033 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-15 20:21:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:31,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:31,034 INFO L225 Difference]: With dead ends: 82 [2020-10-15 20:21:31,034 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 20:21:31,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 20:21:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-15 20:21:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-15 20:21:31,038 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-15 20:21:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:31,038 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-15 20:21:31,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-15 20:21:31,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:31,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:31,039 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:31,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 20:21:31,247 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:31,248 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-15 20:21:31,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:31,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434044999] [2020-10-15 20:21:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:31,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434044999] [2020-10-15 20:21:31,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804953018] [2020-10-15 20:21:31,341 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 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 20:21:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:31,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:31,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:31,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367683783] [2020-10-15 20:21:31,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:31,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:31,398 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-15 20:21:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:31,632 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-15 20:21:31,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:31,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:31,634 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:31,634 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:31,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:31,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-15 20:21:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:21:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-15 20:21:31,637 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-15 20:21:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:31,638 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-15 20:21:31,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-15 20:21:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:31,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:31,638 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:31,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 20:21:31,850 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-15 20:21:31,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:31,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118598465] [2020-10-15 20:21:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:31,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118598465] [2020-10-15 20:21:31,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311610236] [2020-10-15 20:21:31,944 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 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 20:21:31,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:31,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:31,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:32,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:32,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:32,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:32,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073581578] [2020-10-15 20:21:32,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:32,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:32,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:32,039 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-15 20:21:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:32,324 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-15 20:21:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:32,330 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:32,331 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:21:32,331 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:21:32,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:21:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-15 20:21:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-15 20:21:32,334 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-15 20:21:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:32,334 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-15 20:21:32,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-15 20:21:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:32,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:32,335 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:32,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:32,536 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:32,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:32,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-15 20:21:32,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:32,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798957309] [2020-10-15 20:21:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:32,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798957309] [2020-10-15 20:21:32,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696940184] [2020-10-15 20:21:32,624 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 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 20:21:32,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:21:32,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:32,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:32,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:32,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:32,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:32,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746218792] [2020-10-15 20:21:32,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:32,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:32,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:32,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:32,695 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-15 20:21:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:32,989 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-15 20:21:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:32,990 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:32,991 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:21:32,991 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:21:32,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:21:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:21:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-15 20:21:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:32,994 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-15 20:21:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:32,994 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:32,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:32,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:32,995 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:33,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:33,204 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:33,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-15 20:21:33,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:33,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53435360] [2020-10-15 20:21:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:33,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53435360] [2020-10-15 20:21:33,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365311491] [2020-10-15 20:21:33,295 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 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 20:21:33,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:33,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:33,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:33,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:33,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:33,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:33,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:33,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953718146] [2020-10-15 20:21:33,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:33,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:33,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:33,375 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-15 20:21:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:33,753 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-15 20:21:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:33,754 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:33,755 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:21:33,755 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:21:33,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:21:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-15 20:21:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:33,759 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-15 20:21:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:33,759 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:33,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:33,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:33,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:33,760 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:33,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 20:21:33,961 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:33,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-15 20:21:33,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:33,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931799434] [2020-10-15 20:21:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:34,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931799434] [2020-10-15 20:21:34,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836366718] [2020-10-15 20:21:34,049 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 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 20:21:34,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:34,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:34,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:34,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:34,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11972325] [2020-10-15 20:21:34,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:34,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:34,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:34,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:34,140 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-15 20:21:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:34,439 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-15 20:21:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:21:34,440 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:34,441 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:21:34,441 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:21:34,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:21:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:21:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-15 20:21:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 20:21:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-15 20:21:34,444 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-15 20:21:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:34,444 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-15 20:21:34,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-15 20:21:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:34,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:34,445 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:34,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:34,646 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:34,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-15 20:21:34,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:34,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515970095] [2020-10-15 20:21:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:34,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515970095] [2020-10-15 20:21:34,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162999521] [2020-10-15 20:21:34,732 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 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 20:21:34,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:34,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:34,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:34,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:34,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:34,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384918494] [2020-10-15 20:21:34,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:34,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:34,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:34,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:34,812 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-15 20:21:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:35,230 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-15 20:21:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:35,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:35,232 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:35,232 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:35,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:35,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-15 20:21:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:21:35,235 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-15 20:21:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:35,235 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:21:35,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:21:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:35,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:35,236 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:35,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 20:21:35,443 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:35,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-15 20:21:35,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:35,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624213107] [2020-10-15 20:21:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:35,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624213107] [2020-10-15 20:21:35,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946495697] [2020-10-15 20:21:35,538 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 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 20:21:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:35,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:35,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:35,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:35,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035125331] [2020-10-15 20:21:35,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:35,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:35,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:35,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:35,605 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-15 20:21:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:35,964 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 20:21:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:35,964 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:35,966 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:21:35,966 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:21:35,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:21:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:21:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-15 20:21:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:21:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-15 20:21:35,970 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-15 20:21:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:35,970 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-15 20:21:35,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-15 20:21:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:35,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:35,971 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:36,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 20:21:36,180 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:36,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-15 20:21:36,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:36,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825641503] [2020-10-15 20:21:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:36,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825641503] [2020-10-15 20:21:36,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368271887] [2020-10-15 20:21:36,266 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 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 20:21:36,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:36,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:36,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:36,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:36,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:36,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378412795] [2020-10-15 20:21:36,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:36,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:36,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:36,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:36,356 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-15 20:21:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:36,826 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-15 20:21:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:21:36,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:36,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:36,827 INFO L225 Difference]: With dead ends: 85 [2020-10-15 20:21:36,827 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:36,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:21:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-15 20:21:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:21:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-15 20:21:36,830 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-15 20:21:36,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:36,830 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-15 20:21:36,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-15 20:21:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:36,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:36,831 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:37,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 20:21:37,038 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:37,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-15 20:21:37,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:37,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142729031] [2020-10-15 20:21:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:37,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142729031] [2020-10-15 20:21:37,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823877941] [2020-10-15 20:21:37,196 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 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 20:21:37,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:21:37,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:37,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:37,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:37,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:37,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:37,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613869413] [2020-10-15 20:21:37,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:37,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:37,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:37,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:37,260 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-15 20:21:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:37,462 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 20:21:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:37,462 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:37,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:37,463 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:21:37,463 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:21:37,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:37,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:21:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-15 20:21:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:37,467 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:37,467 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:37,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:37,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:37,468 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:37,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 20:21:37,678 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:37,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-15 20:21:37,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:37,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119190582] [2020-10-15 20:21:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:37,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119190582] [2020-10-15 20:21:37,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787663234] [2020-10-15 20:21:37,801 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 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 20:21:37,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:37,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:37,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:37,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:37,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:37,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048499820] [2020-10-15 20:21:37,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:37,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:37,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:37,880 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:38,160 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-15 20:21:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:38,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:38,161 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:21:38,161 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:21:38,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:21:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:21:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 20:21:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:38,168 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:38,169 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:38,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:38,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:38,169 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:38,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 20:21:38,380 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:38,380 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-15 20:21:38,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:38,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769637210] [2020-10-15 20:21:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:38,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769637210] [2020-10-15 20:21:38,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913465272] [2020-10-15 20:21:38,486 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 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 20:21:38,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:38,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:38,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:38,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:38,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:38,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539416769] [2020-10-15 20:21:38,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:38,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:38,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:38,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:38,543 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:38,805 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:21:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:38,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:38,807 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:21:38,807 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:21:38,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:21:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-15 20:21:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:38,811 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:38,811 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:38,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:38,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:38,812 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:39,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:39,020 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-15 20:21:39,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:39,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645321026] [2020-10-15 20:21:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645321026] [2020-10-15 20:21:39,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718682431] [2020-10-15 20:21:39,126 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 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 20:21:39,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:39,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:39,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:39,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:39,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:39,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:39,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720566666] [2020-10-15 20:21:39,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:39,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:39,203 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:39,571 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-15 20:21:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:39,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:39,572 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:21:39,573 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:21:39,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:21:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:21:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-15 20:21:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:39,576 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:39,576 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:39,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:39,576 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:39,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:39,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:39,577 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:39,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:39,783 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-15 20:21:39,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:39,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286491710] [2020-10-15 20:21:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286491710] [2020-10-15 20:21:39,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279446663] [2020-10-15 20:21:39,885 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 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 20:21:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:39,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:39,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432239382] [2020-10-15 20:21:39,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:39,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:39,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:39,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:39,947 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:40,255 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 20:21:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:40,256 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:40,257 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:40,257 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:40,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-15 20:21:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:40,260 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:40,260 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:40,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:40,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:40,260 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:40,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-15 20:21:40,462 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-15 20:21:40,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:40,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634320492] [2020-10-15 20:21:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634320492] [2020-10-15 20:21:40,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641089374] [2020-10-15 20:21:40,561 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 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 20:21:40,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:40,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:40,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:40,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:40,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:40,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:40,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800514074] [2020-10-15 20:21:40,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:40,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:40,649 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:41,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:41,064 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:21:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:41,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:41,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:41,066 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:41,066 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:41,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:21:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:41,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-15 20:21:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:41,069 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:41,069 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:41,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:41,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:41,070 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:41,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:41,273 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-15 20:21:41,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:41,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850902760] [2020-10-15 20:21:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:41,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850902760] [2020-10-15 20:21:41,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900720207] [2020-10-15 20:21:41,376 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 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 20:21:41,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:21:41,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:41,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:41,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:41,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:41,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:41,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418843852] [2020-10-15 20:21:41,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:41,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:41,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:41,477 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:41,860 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-15 20:21:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:21:41,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:41,862 INFO L225 Difference]: With dead ends: 80 [2020-10-15 20:21:41,862 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 20:21:41,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 20:21:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-15 20:21:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:41,865 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:41,865 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:41,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:41,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:41,866 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:42,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 20:21:42,075 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-15 20:21:42,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:42,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983958533] [2020-10-15 20:21:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:42,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983958533] [2020-10-15 20:21:42,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188223689] [2020-10-15 20:21:42,171 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 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 20:21:42,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:42,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:42,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:42,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:42,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:42,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:42,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494483229] [2020-10-15 20:21:42,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:42,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:42,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:42,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:42,258 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:42,730 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-15 20:21:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:21:42,731 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:42,732 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:42,732 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:42,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:21:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-15 20:21:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:42,735 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:42,736 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:42,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:42,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:42,737 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:42,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:42,946 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:42,946 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-15 20:21:42,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:42,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954919967] [2020-10-15 20:21:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954919967] [2020-10-15 20:21:43,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325145178] [2020-10-15 20:21:43,032 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 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 20:21:43,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:43,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:43,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:43,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:43,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417943390] [2020-10-15 20:21:43,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:43,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:43,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:43,092 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:43,489 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 20:21:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:43,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:43,491 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:21:43,491 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:21:43,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:21:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:21:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-15 20:21:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:21:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-15 20:21:43,494 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-15 20:21:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:43,494 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-15 20:21:43,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-15 20:21:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:43,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:43,495 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:43,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 20:21:43,696 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:43,697 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-15 20:21:43,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:43,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181588438] [2020-10-15 20:21:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181588438] [2020-10-15 20:21:43,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363250926] [2020-10-15 20:21:43,788 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 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 20:21:43,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:43,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:43,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:43,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:43,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565904047] [2020-10-15 20:21:43,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:43,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:43,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:43,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:43,861 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-15 20:21:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:44,354 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-15 20:21:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:21:44,354 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:44,355 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:44,355 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:44,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:21:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-15 20:21:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:21:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-15 20:21:44,358 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-15 20:21:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:44,358 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-15 20:21:44,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-15 20:21:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:44,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:44,358 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:44,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:44,559 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:44,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-15 20:21:44,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:44,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715797351] [2020-10-15 20:21:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:44,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715797351] [2020-10-15 20:21:44,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775171470] [2020-10-15 20:21:44,647 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 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 20:21:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:44,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:44,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:44,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:44,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:44,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:44,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815494795] [2020-10-15 20:21:44,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:44,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:44,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:44,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:44,720 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-15 20:21:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:45,200 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-15 20:21:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:45,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:45,202 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:45,202 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:21:45,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:21:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:21:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-15 20:21:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:21:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 20:21:45,206 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-15 20:21:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:45,206 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 20:21:45,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 20:21:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:45,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:45,207 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:45,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 20:21:45,416 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:45,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:45,416 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-15 20:21:45,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:45,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461222657] [2020-10-15 20:21:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461222657] [2020-10-15 20:21:45,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912054204] [2020-10-15 20:21:45,517 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 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 20:21:45,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:45,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:45,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:45,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:45,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:45,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938638289] [2020-10-15 20:21:45,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:45,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:45,595 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-15 20:21:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,113 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-15 20:21:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:46,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,114 INFO L225 Difference]: With dead ends: 72 [2020-10-15 20:21:46,114 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 20:21:46,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:21:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 20:21:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-15 20:21:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-15 20:21:46,118 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-15 20:21:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,118 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-15 20:21:46,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-15 20:21:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:46,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,119 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:46,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 20:21:46,326 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-15 20:21:46,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:46,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204743619] [2020-10-15 20:21:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204743619] [2020-10-15 20:21:46,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409256653] [2020-10-15 20:21:46,449 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 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 20:21:46,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:21:46,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:46,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:46,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:46,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:46,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557489859] [2020-10-15 20:21:46,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:46,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:46,534 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-15 20:21:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,757 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-15 20:21:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:46,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,759 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:46,759 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:46,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:21:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-15 20:21:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-15 20:21:46,763 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-15 20:21:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,763 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-15 20:21:46,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-15 20:21:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:46,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,764 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:46,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:46,973 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-15 20:21:46,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:46,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647954434] [2020-10-15 20:21:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647954434] [2020-10-15 20:21:47,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067262008] [2020-10-15 20:21:47,110 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 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 20:21:47,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:47,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:47,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:47,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:47,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:47,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:47,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031182607] [2020-10-15 20:21:47,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:47,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:47,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:47,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:47,177 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-15 20:21:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:47,446 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-15 20:21:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:47,446 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:47,447 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:21:47,447 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:21:47,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:21:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:21:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-15 20:21:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-15 20:21:47,450 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-15 20:21:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:47,450 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-15 20:21:47,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-15 20:21:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:47,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:47,451 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:47,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:47,660 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-15 20:21:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:47,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916761019] [2020-10-15 20:21:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916761019] [2020-10-15 20:21:47,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394949838] [2020-10-15 20:21:47,797 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 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 20:21:47,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:21:47,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:47,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:47,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548856822] [2020-10-15 20:21:47,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:47,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:47,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:47,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:47,854 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-15 20:21:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:48,158 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-15 20:21:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:48,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:48,159 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:21:48,159 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:21:48,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:21:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-15 20:21:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 20:21:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-15 20:21:48,161 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-15 20:21:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:48,162 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-15 20:21:48,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-15 20:21:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:48,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:48,162 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:48,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:48,363 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-15 20:21:48,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:48,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66908222] [2020-10-15 20:21:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66908222] [2020-10-15 20:21:48,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043838038] [2020-10-15 20:21:48,491 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 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 20:21:48,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:21:48,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:48,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:48,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:48,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:48,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740542649] [2020-10-15 20:21:48,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:48,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:48,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:48,562 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-15 20:21:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:48,894 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-15 20:21:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:48,895 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:48,896 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:21:48,896 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:21:48,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:21:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-15 20:21:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-15 20:21:48,899 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-15 20:21:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:48,899 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-15 20:21:48,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-15 20:21:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:48,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:48,900 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:49,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:49,101 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-15 20:21:49,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:49,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076529913] [2020-10-15 20:21:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076529913] [2020-10-15 20:21:49,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517958985] [2020-10-15 20:21:49,221 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 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 20:21:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:49,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:49,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307081464] [2020-10-15 20:21:49,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:49,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:49,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:49,320 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-15 20:21:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:49,787 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 20:21:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:21:49,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:49,789 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:21:49,789 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:21:49,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:21:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:21:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-15 20:21:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:21:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-15 20:21:49,793 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-15 20:21:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:49,794 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-15 20:21:49,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-15 20:21:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:49,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:49,795 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:49,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-15 20:21:49,996 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:49,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-15 20:21:49,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:49,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965836353] [2020-10-15 20:21:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965836353] [2020-10-15 20:21:50,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446575760] [2020-10-15 20:21:50,175 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 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 20:21:50,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:50,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:50,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:50,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:50,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:50,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:50,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608463200] [2020-10-15 20:21:50,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:50,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:50,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:50,254 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-15 20:21:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:50,644 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-15 20:21:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:50,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:50,646 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:21:50,646 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:21:50,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:21:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:21:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-15 20:21:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:21:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-15 20:21:50,649 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-15 20:21:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:50,649 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-15 20:21:50,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-15 20:21:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:50,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:50,649 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:50,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:50,850 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:50,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-15 20:21:50,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:50,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291958314] [2020-10-15 20:21:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291958314] [2020-10-15 20:21:50,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883638541] [2020-10-15 20:21:50,957 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 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 20:21:51,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:21:51,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:51,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:51,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:51,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039527271] [2020-10-15 20:21:51,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:51,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:51,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:51,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:51,044 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-15 20:21:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:51,447 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-15 20:21:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:51,447 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:51,449 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:21:51,449 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:21:51,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:21:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:21:51,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-15 20:21:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:51,452 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-15 20:21:51,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:51,453 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:51,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:51,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:51,453 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:51,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-15 20:21:51,662 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:51,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:51,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-15 20:21:51,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:51,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227821403] [2020-10-15 20:21:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227821403] [2020-10-15 20:21:51,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108194979] [2020-10-15 20:21:51,775 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 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 20:21:51,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:51,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:51,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:51,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:51,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:51,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:51,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790964316] [2020-10-15 20:21:51,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:51,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:51,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:51,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:51,852 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-15 20:21:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:52,451 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 20:21:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:21:52,452 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:52,453 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:21:52,453 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:21:52,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:21:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:21:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-15 20:21:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:52,457 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-15 20:21:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:52,458 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:52,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:52,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:52,459 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:52,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:52,660 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:52,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-15 20:21:52,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:52,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256065120] [2020-10-15 20:21:52,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256065120] [2020-10-15 20:21:52,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63584620] [2020-10-15 20:21:52,800 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 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 20:21:52,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:21:52,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:52,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:52,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:52,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68417611] [2020-10-15 20:21:52,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:52,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:52,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:52,922 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-15 20:21:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:53,495 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-15 20:21:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:21:53,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:53,496 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:21:53,496 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:21:53,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:21:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:21:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-15 20:21:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:21:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-15 20:21:53,499 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-15 20:21:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:53,499 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-15 20:21:53,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-15 20:21:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:53,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:53,500 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:53,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 20:21:53,709 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:53,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-15 20:21:53,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:53,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066393552] [2020-10-15 20:21:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:53,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066393552] [2020-10-15 20:21:53,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378429531] [2020-10-15 20:21:53,828 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 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 20:21:53,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:21:53,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:53,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:53,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:53,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:53,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632036981] [2020-10-15 20:21:53,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:53,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:53,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:53,907 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-15 20:21:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:54,443 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-15 20:21:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:21:54,444 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:54,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:54,445 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:21:54,445 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:21:54,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:21:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:21:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-15 20:21:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:21:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 20:21:54,448 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-15 20:21:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:54,448 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 20:21:54,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 20:21:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:54,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:54,449 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:54,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:54,658 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-15 20:21:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:54,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103082949] [2020-10-15 20:21:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103082949] [2020-10-15 20:21:54,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330304535] [2020-10-15 20:21:54,770 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 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 20:21:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:54,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:54,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:54,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:54,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041435716] [2020-10-15 20:21:54,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:54,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:54,830 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-15 20:21:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:55,300 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-15 20:21:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:21:55,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:55,301 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:21:55,302 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:21:55,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:21:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:21:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-15 20:21:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:21:55,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-15 20:21:55,304 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-15 20:21:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:55,305 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-15 20:21:55,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-15 20:21:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:55,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:55,305 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:55,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:55,513 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-15 20:21:55,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:55,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905876682] [2020-10-15 20:21:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905876682] [2020-10-15 20:21:55,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171388035] [2020-10-15 20:21:55,611 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 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 20:21:55,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:55,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:55,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:55,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:55,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:55,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:55,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635339304] [2020-10-15 20:21:55,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:55,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:55,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:55,683 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-15 20:21:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:56,254 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-15 20:21:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:21:56,255 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:56,256 INFO L225 Difference]: With dead ends: 93 [2020-10-15 20:21:56,256 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:21:56,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:21:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:21:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-15 20:21:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:21:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-15 20:21:56,259 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-15 20:21:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:56,259 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-15 20:21:56,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-15 20:21:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:56,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:56,260 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:56,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:56,460 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-15 20:21:56,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:56,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467223109] [2020-10-15 20:21:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467223109] [2020-10-15 20:21:56,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904717951] [2020-10-15 20:21:56,618 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 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 20:21:56,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:21:56,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:56,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:56,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:56,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:21:56,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201083247] [2020-10-15 20:21:56,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:56,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:56,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:56,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:56,704 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-15 20:21:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:57,053 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-15 20:21:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:57,054 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:21:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:57,055 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:21:57,055 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:21:57,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:21:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 20:21:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:21:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:21:57,058 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:21:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:57,058 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:21:57,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:57,058 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:21:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:57,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:57,059 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:57,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:57,266 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:57,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:57,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-15 20:21:57,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:57,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604408911] [2020-10-15 20:21:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604408911] [2020-10-15 20:21:57,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506813009] [2020-10-15 20:21:57,432 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 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 20:21:57,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:57,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:57,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:57,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:57,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:21:57,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87498258] [2020-10-15 20:21:57,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:21:57,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:57,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:21:57,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:57,526 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:21:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:57,865 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-15 20:21:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:57,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:21:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:57,867 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:21:57,867 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:21:57,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:21:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:21:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-15 20:21:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:21:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:21:57,870 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:21:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:57,870 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:21:57,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:21:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:21:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:57,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:57,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:58,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:58,080 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-15 20:21:58,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:58,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605971032] [2020-10-15 20:21:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:58,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605971032] [2020-10-15 20:21:58,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408728776] [2020-10-15 20:21:58,226 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 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 20:21:58,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:21:58,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:58,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:58,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:58,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:21:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124895520] [2020-10-15 20:21:58,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:58,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:58,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:58,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:58,292 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:21:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:58,615 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-15 20:21:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:58,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:21:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:58,617 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:21:58,617 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:21:58,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:58,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:21:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-15 20:21:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:21:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:21:58,620 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:21:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:58,620 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:21:58,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:58,621 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:21:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:58,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:58,621 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:58,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:58,826 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-15 20:21:58,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:58,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101378191] [2020-10-15 20:21:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:58,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101378191] [2020-10-15 20:21:58,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852224375] [2020-10-15 20:21:58,975 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 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 20:21:59,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:21:59,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:59,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:59,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:59,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:21:59,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611232712] [2020-10-15 20:21:59,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:21:59,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:59,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:21:59,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:59,055 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:21:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:59,482 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-15 20:21:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:59,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:21:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:59,484 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:21:59,484 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:21:59,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:21:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:21:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-15 20:21:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:21:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:21:59,487 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:21:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:59,488 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:21:59,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:21:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:21:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:59,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:59,488 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:59,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:59,696 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:59,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-15 20:21:59,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:59,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173738963] [2020-10-15 20:21:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173738963] [2020-10-15 20:21:59,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005540762] [2020-10-15 20:21:59,823 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 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 20:21:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:59,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:59,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:21:59,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373408018] [2020-10-15 20:21:59,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:59,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:59,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:59,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:59,886 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:00,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:00,259 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-15 20:22:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:00,261 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:00,262 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:22:00,262 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:22:00,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:22:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-15 20:22:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:00,270 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:00,270 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:00,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:00,270 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:00,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:00,271 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:00,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-15 20:22:00,473 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-15 20:22:00,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:00,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221823678] [2020-10-15 20:22:00,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221823678] [2020-10-15 20:22:00,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805600813] [2020-10-15 20:22:00,634 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 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 20:22:00,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:00,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:00,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:00,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:00,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:00,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:00,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061979056] [2020-10-15 20:22:00,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:00,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:00,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:00,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:00,715 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:01,211 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-15 20:22:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:01,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:01,213 INFO L225 Difference]: With dead ends: 93 [2020-10-15 20:22:01,213 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 20:22:01,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 20:22:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-15 20:22:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:01,217 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:01,217 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:01,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:01,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:01,217 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:01,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:01,418 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:01,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:01,419 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-15 20:22:01,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:01,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426005233] [2020-10-15 20:22:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426005233] [2020-10-15 20:22:01,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383321815] [2020-10-15 20:22:01,544 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 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 20:22:01,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:01,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:01,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:01,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:01,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:01,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208934299] [2020-10-15 20:22:01,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:01,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:01,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:01,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:01,603 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:02,036 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-15 20:22:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:02,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:02,038 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:22:02,038 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:22:02,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:22:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-15 20:22:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:02,041 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:02,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:02,041 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:02,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:02,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:02,042 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:02,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-15 20:22:02,243 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-15 20:22:02,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:02,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344964576] [2020-10-15 20:22:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:02,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344964576] [2020-10-15 20:22:02,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405228298] [2020-10-15 20:22:02,371 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 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 20:22:02,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:02,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:02,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:02,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:02,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:02,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107875549] [2020-10-15 20:22:02,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:02,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:02,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:02,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:02,446 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:03,003 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 20:22:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:03,003 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:03,004 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:03,004 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:03,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:22:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:03,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-15 20:22:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:03,008 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:03,008 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:03,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:03,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:03,009 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:03,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:03,216 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:03,216 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-15 20:22:03,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:03,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518728400] [2020-10-15 20:22:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518728400] [2020-10-15 20:22:03,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064436948] [2020-10-15 20:22:03,334 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 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 20:22:03,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:03,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:03,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:03,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:03,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64321903] [2020-10-15 20:22:03,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:03,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:03,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:03,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:03,409 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:03,882 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-15 20:22:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:03,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:03,884 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:22:03,884 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:22:03,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:22:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-15 20:22:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:03,888 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:03,888 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:03,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:03,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:03,889 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:04,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:04,100 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-15 20:22:04,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:04,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145614222] [2020-10-15 20:22:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145614222] [2020-10-15 20:22:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971273470] [2020-10-15 20:22:04,211 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 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 20:22:04,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:04,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:04,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:04,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:04,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:04,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:04,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:04,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884414318] [2020-10-15 20:22:04,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:04,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:04,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:04,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:04,298 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:04,920 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-15 20:22:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:04,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:04,922 INFO L225 Difference]: With dead ends: 85 [2020-10-15 20:22:04,922 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:22:04,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:22:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-15 20:22:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:04,925 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:04,926 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:04,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:04,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:04,926 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:05,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:05,136 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:05,136 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-15 20:22:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:05,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230649367] [2020-10-15 20:22:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230649367] [2020-10-15 20:22:05,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198886592] [2020-10-15 20:22:05,256 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 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 20:22:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:05,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:05,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038007333] [2020-10-15 20:22:05,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:05,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:05,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:05,323 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:05,846 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 20:22:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:05,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:05,848 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:22:05,848 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:22:05,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:22:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-15 20:22:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:22:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-15 20:22:05,851 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-15 20:22:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:05,852 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-15 20:22:05,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-15 20:22:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:05,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:05,852 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:06,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:06,061 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:06,061 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-15 20:22:06,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:06,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700005867] [2020-10-15 20:22:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700005867] [2020-10-15 20:22:06,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737623319] [2020-10-15 20:22:06,181 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 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 20:22:06,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:06,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:06,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:06,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:06,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:06,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:06,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852146324] [2020-10-15 20:22:06,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:06,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:06,261 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-15 20:22:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:06,960 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-15 20:22:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:06,960 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:06,961 INFO L225 Difference]: With dead ends: 82 [2020-10-15 20:22:06,962 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 20:22:06,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 20:22:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-15 20:22:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 20:22:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-15 20:22:06,964 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-15 20:22:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:06,965 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-15 20:22:06,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-15 20:22:06,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:06,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:06,965 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:07,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:07,174 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:07,175 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-15 20:22:07,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:07,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718021745] [2020-10-15 20:22:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:07,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718021745] [2020-10-15 20:22:07,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120485554] [2020-10-15 20:22:07,288 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 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 20:22:07,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:07,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:07,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:07,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:07,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:07,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:07,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:07,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860371168] [2020-10-15 20:22:07,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:07,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:07,366 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-15 20:22:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:07,978 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 20:22:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:07,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:07,980 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:22:07,980 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 20:22:07,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 20:22:07,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-15 20:22:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 20:22:07,983 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-15 20:22:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:07,983 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 20:22:07,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 20:22:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:07,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:07,984 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:08,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:08,193 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:08,193 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-15 20:22:08,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:08,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035666861] [2020-10-15 20:22:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035666861] [2020-10-15 20:22:08,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451889579] [2020-10-15 20:22:08,320 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 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 20:22:08,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:08,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:08,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:08,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:08,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445130231] [2020-10-15 20:22:08,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:08,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:08,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:08,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:08,407 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-15 20:22:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:09,079 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-15 20:22:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:09,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:09,081 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:22:09,081 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:22:09,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:22:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-15 20:22:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:22:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-15 20:22:09,084 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-15 20:22:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:09,084 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-15 20:22:09,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-15 20:22:09,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:09,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:09,085 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:09,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-15 20:22:09,287 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:09,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-15 20:22:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:09,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362183976] [2020-10-15 20:22:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362183976] [2020-10-15 20:22:09,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205738507] [2020-10-15 20:22:09,469 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 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 20:22:09,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:09,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:09,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:09,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:09,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380307442] [2020-10-15 20:22:09,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:09,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:09,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:09,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:09,529 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-15 20:22:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:09,840 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 20:22:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:09,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:09,841 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:09,842 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:22:09,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:22:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:22:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-15 20:22:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-15 20:22:09,844 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-15 20:22:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:09,845 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-15 20:22:09,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-15 20:22:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:09,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:09,845 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:10,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:10,046 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:10,046 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-15 20:22:10,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:10,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437904514] [2020-10-15 20:22:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:10,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437904514] [2020-10-15 20:22:10,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938355569] [2020-10-15 20:22:10,226 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 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 20:22:10,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:10,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:10,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:10,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:10,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:10,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705580941] [2020-10-15 20:22:10,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:10,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:10,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:10,305 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-15 20:22:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:10,615 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-15 20:22:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:10,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:10,617 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:22:10,617 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:22:10,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:22:10,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:22:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-15 20:22:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:22:10,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-15 20:22:10,620 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-15 20:22:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:10,620 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-15 20:22:10,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-15 20:22:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:10,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:10,620 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:10,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-15 20:22:10,821 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:10,822 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-15 20:22:10,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:10,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622554360] [2020-10-15 20:22:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:10,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622554360] [2020-10-15 20:22:10,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883055511] [2020-10-15 20:22:10,991 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 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 20:22:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:11,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:11,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:11,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:11,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645856027] [2020-10-15 20:22:11,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:11,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:11,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:11,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:11,048 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-15 20:22:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:11,413 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 20:22:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:11,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:11,415 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:11,415 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:11,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-15 20:22:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-15 20:22:11,418 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-15 20:22:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:11,419 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-15 20:22:11,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-15 20:22:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:11,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:11,419 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:11,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:11,620 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:11,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-15 20:22:11,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:11,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745892269] [2020-10-15 20:22:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745892269] [2020-10-15 20:22:11,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314014652] [2020-10-15 20:22:11,794 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 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 20:22:11,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:11,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:11,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:11,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:11,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458351850] [2020-10-15 20:22:11,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:11,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:11,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:11,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:11,878 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-15 20:22:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:12,291 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-15 20:22:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:12,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:12,293 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:12,293 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:22:12,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:22:12,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-15 20:22:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-15 20:22:12,296 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-15 20:22:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:12,296 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-15 20:22:12,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-15 20:22:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:12,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:12,296 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:12,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:12,497 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:12,498 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-15 20:22:12,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:12,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792197868] [2020-10-15 20:22:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792197868] [2020-10-15 20:22:12,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116380526] [2020-10-15 20:22:12,656 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 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 20:22:12,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:12,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:12,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:12,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:12,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:12,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963894063] [2020-10-15 20:22:12,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:12,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:12,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:12,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:12,714 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-15 20:22:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:13,137 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-15 20:22:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:13,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:13,139 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:13,139 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:22:13,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:22:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-15 20:22:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:22:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-15 20:22:13,142 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-15 20:22:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:13,143 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-15 20:22:13,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-15 20:22:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:13,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:13,143 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:13,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 20:22:13,353 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-15 20:22:13,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:13,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542832821] [2020-10-15 20:22:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:13,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542832821] [2020-10-15 20:22:13,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368080792] [2020-10-15 20:22:13,515 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 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 20:22:13,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:13,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:13,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:13,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:13,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:13,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:13,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033312405] [2020-10-15 20:22:13,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:13,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:13,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:13,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:13,600 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-15 20:22:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:14,086 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-15 20:22:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:14,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:14,087 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:22:14,088 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:22:14,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:22:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 20:22:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-15 20:22:14,090 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-15 20:22:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:14,090 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-15 20:22:14,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-15 20:22:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:14,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:14,091 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:14,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 20:22:14,300 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-15 20:22:14,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:14,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119810784] [2020-10-15 20:22:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119810784] [2020-10-15 20:22:14,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629774298] [2020-10-15 20:22:14,451 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 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 20:22:14,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:14,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:14,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:14,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:14,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802857290] [2020-10-15 20:22:14,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:14,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:14,510 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-15 20:22:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:14,962 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-15 20:22:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:14,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:14,963 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:14,964 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:14,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:22:14,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:14,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 20:22:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:22:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-15 20:22:14,966 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-15 20:22:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:14,967 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-15 20:22:14,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-15 20:22:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:14,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:14,968 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:15,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:15,177 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:15,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-15 20:22:15,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:15,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455376120] [2020-10-15 20:22:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455376120] [2020-10-15 20:22:15,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700385287] [2020-10-15 20:22:15,329 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 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 20:22:15,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:15,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:15,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:15,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:15,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:15,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356268730] [2020-10-15 20:22:15,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:15,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:15,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:15,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:15,406 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-15 20:22:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:15,968 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-15 20:22:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:15,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:15,969 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:15,969 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:15,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-15 20:22:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-15 20:22:15,973 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-15 20:22:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:15,973 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-15 20:22:15,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-15 20:22:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:15,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:15,974 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:16,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 20:22:16,179 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:16,180 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-15 20:22:16,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:16,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512666112] [2020-10-15 20:22:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:16,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512666112] [2020-10-15 20:22:16,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122151802] [2020-10-15 20:22:16,322 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 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 20:22:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:16,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:16,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:16,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:16,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349932501] [2020-10-15 20:22:16,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:16,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:16,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:16,379 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-15 20:22:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:16,889 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-15 20:22:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:16,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:16,891 INFO L225 Difference]: With dead ends: 105 [2020-10-15 20:22:16,891 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 20:22:16,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 20:22:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-15 20:22:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:16,895 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-15 20:22:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:16,895 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:16,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:16,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:16,896 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:17,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:17,104 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:17,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-15 20:22:17,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:17,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861154583] [2020-10-15 20:22:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:17,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861154583] [2020-10-15 20:22:17,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501543540] [2020-10-15 20:22:17,248 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 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 20:22:17,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:17,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:17,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:17,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:17,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:17,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36644882] [2020-10-15 20:22:17,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:17,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:17,331 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-15 20:22:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:17,958 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-15 20:22:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:17,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:17,959 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:22:17,960 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:22:17,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:22:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:22:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-15 20:22:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:17,962 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-15 20:22:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:17,962 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:17,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:17,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:17,963 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:18,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-15 20:22:18,165 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:18,165 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-15 20:22:18,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:18,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056664810] [2020-10-15 20:22:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056664810] [2020-10-15 20:22:18,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250682682] [2020-10-15 20:22:18,304 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 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 20:22:18,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:18,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:18,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:18,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:18,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621328066] [2020-10-15 20:22:18,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:18,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:18,368 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-15 20:22:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:18,925 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-15 20:22:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:22:18,926 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:18,927 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:22:18,927 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:22:18,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:22:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-15 20:22:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:22:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-15 20:22:18,930 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-15 20:22:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:18,930 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-15 20:22:18,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-15 20:22:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:18,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:18,931 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:19,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:19,132 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-15 20:22:19,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:19,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962160313] [2020-10-15 20:22:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:19,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962160313] [2020-10-15 20:22:19,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488180974] [2020-10-15 20:22:19,285 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 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 20:22:19,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:19,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:19,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:19,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:19,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:19,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:19,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:19,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104280876] [2020-10-15 20:22:19,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:19,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:19,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:19,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:19,361 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-15 20:22:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:20,093 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-15 20:22:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:20,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:20,094 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:22:20,094 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 20:22:20,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:20,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 20:22:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-15 20:22:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 20:22:20,097 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-15 20:22:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:20,097 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 20:22:20,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 20:22:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:20,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:20,098 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:20,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 20:22:20,306 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:20,306 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-15 20:22:20,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:20,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434038969] [2020-10-15 20:22:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:20,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434038969] [2020-10-15 20:22:20,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167788615] [2020-10-15 20:22:20,431 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 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 20:22:20,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:20,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:20,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:20,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:20,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249336697] [2020-10-15 20:22:20,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:20,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:20,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:20,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:20,512 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-15 20:22:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:21,137 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 20:22:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:21,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:21,138 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:22:21,138 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:22:21,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:22:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:22:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-15 20:22:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:22:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-15 20:22:21,140 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-15 20:22:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:21,141 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-15 20:22:21,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-15 20:22:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:21,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:21,143 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:21,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 20:22:21,350 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-15 20:22:21,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:21,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939302847] [2020-10-15 20:22:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:21,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939302847] [2020-10-15 20:22:21,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695791967] [2020-10-15 20:22:21,522 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 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 20:22:21,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:21,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:21,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:21,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:21,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:21,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:21,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:21,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532546326] [2020-10-15 20:22:21,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:21,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:21,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:21,643 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-15 20:22:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:22,402 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-15 20:22:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:22:22,402 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:22,403 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:22:22,403 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:22,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:22:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-15 20:22:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:22:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-15 20:22:22,405 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-15 20:22:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:22,405 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-15 20:22:22,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-15 20:22:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:22,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:22,406 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:22,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:22,607 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:22,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:22,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-15 20:22:22,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:22,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314697980] [2020-10-15 20:22:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314697980] [2020-10-15 20:22:22,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18187345] [2020-10-15 20:22:22,811 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 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 20:22:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:22,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:22,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700589759] [2020-10-15 20:22:22,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:22,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:22,868 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-15 20:22:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:23,201 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-15 20:22:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:23,201 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:23,202 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:22:23,202 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:22:23,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:22:23,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-15 20:22:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:23,205 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:23,206 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:23,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:23,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:23,207 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:23,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:23,413 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:23,413 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-15 20:22:23,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:23,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569994512] [2020-10-15 20:22:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569994512] [2020-10-15 20:22:23,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141942855] [2020-10-15 20:22:23,613 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 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 20:22:23,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:23,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:23,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:23,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:23,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858234852] [2020-10-15 20:22:23,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:23,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:23,690 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:24,126 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-15 20:22:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:24,128 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:24,128 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:22:24,129 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:22:24,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:22:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-15 20:22:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:24,131 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:24,132 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:24,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:24,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:24,132 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:24,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 20:22:24,333 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-15 20:22:24,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:24,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314425952] [2020-10-15 20:22:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:24,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314425952] [2020-10-15 20:22:24,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907962482] [2020-10-15 20:22:24,501 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 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 20:22:24,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:24,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:24,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:24,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:24,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:24,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:24,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151592980] [2020-10-15 20:22:24,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:24,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:24,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:24,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:24,569 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:24,979 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 20:22:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:24,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:24,980 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:22:24,980 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:22:24,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:22:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-15 20:22:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:24,983 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:24,983 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:24,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:24,983 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:24,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:24,986 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:25,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:25,189 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-15 20:22:25,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:25,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687043221] [2020-10-15 20:22:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:25,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687043221] [2020-10-15 20:22:25,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754538999] [2020-10-15 20:22:25,378 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 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 20:22:25,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:25,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:25,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:25,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:25,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:25,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:25,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60849436] [2020-10-15 20:22:25,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:25,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:25,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:25,456 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:25,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:25,965 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-15 20:22:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:25,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:25,966 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:25,966 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:25,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:22:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-15 20:22:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:25,969 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:25,969 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:25,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:25,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:25,970 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:26,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-15 20:22:26,177 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:26,177 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-15 20:22:26,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:26,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332477103] [2020-10-15 20:22:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:26,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332477103] [2020-10-15 20:22:26,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484191564] [2020-10-15 20:22:26,350 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 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 20:22:26,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:26,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:26,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:26,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:26,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:26,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:26,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705915838] [2020-10-15 20:22:26,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:26,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:26,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:26,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:26,423 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:26,882 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 20:22:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:26,883 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:26,883 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:26,884 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:26,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-15 20:22:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:26,887 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:26,887 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:26,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:26,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:26,888 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:27,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 20:22:27,097 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:27,097 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-15 20:22:27,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:27,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901452830] [2020-10-15 20:22:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901452830] [2020-10-15 20:22:27,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870227827] [2020-10-15 20:22:27,270 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 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 20:22:27,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:27,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:27,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:27,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:27,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:27,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:27,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796151223] [2020-10-15 20:22:27,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:27,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:27,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:27,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:27,352 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:27,935 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-15 20:22:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:27,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:27,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:27,936 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:22:27,937 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:22:27,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:22:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-15 20:22:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:27,940 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:27,941 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:27,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:27,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:27,941 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:28,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-15 20:22:28,147 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:28,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-15 20:22:28,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:28,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119200774] [2020-10-15 20:22:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:28,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119200774] [2020-10-15 20:22:28,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602028787] [2020-10-15 20:22:28,314 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 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 20:22:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:28,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:28,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:28,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:28,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:28,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415881063] [2020-10-15 20:22:28,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:28,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:28,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:28,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:28,374 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:28,880 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-15 20:22:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:28,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:28,888 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:22:28,888 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 20:22:28,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 20:22:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-15 20:22:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:28,890 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:28,891 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:28,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:28,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:28,891 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:29,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:29,100 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:29,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:29,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-15 20:22:29,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:29,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565978] [2020-10-15 20:22:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565978] [2020-10-15 20:22:29,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949478267] [2020-10-15 20:22:29,269 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 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 20:22:29,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:29,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:29,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:29,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:29,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:29,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:29,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610239176] [2020-10-15 20:22:29,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:29,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:29,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:29,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:29,350 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:30,018 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 20:22:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:30,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:30,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:30,019 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:30,019 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:30,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:30,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-15 20:22:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:30,022 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:30,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:30,022 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:30,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:30,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:30,023 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:30,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-15 20:22:30,232 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:30,232 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-15 20:22:30,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:30,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877076389] [2020-10-15 20:22:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:30,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877076389] [2020-10-15 20:22:30,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448186485] [2020-10-15 20:22:30,389 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 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 20:22:30,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:30,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:30,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:30,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:30,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:30,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909948696] [2020-10-15 20:22:30,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:30,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:30,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:30,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:30,454 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:31,009 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-15 20:22:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:31,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:31,011 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:22:31,011 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:22:31,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:22:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:22:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-15 20:22:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:31,014 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:31,014 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:31,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:31,014 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:31,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:31,015 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:31,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:31,218 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:31,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-15 20:22:31,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:31,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402388295] [2020-10-15 20:22:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:31,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402388295] [2020-10-15 20:22:31,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147505279] [2020-10-15 20:22:31,378 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 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 20:22:31,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:31,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:31,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:31,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:31,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:31,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:31,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147952667] [2020-10-15 20:22:31,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:31,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:31,456 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:32,229 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 20:22:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:32,230 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:32,230 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:22:32,231 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:22:32,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:22:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:22:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-15 20:22:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:32,233 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:32,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:32,233 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:32,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:32,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:32,234 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:32,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:32,435 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:32,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-15 20:22:32,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:32,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741513250] [2020-10-15 20:22:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:32,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741513250] [2020-10-15 20:22:32,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005239552] [2020-10-15 20:22:32,589 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 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 20:22:32,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:32,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:32,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:32,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:32,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969728820] [2020-10-15 20:22:32,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:32,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:32,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:32,652 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:33,258 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 20:22:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:22:33,259 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:33,259 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:22:33,259 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:22:33,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:22:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-15 20:22:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:33,263 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:33,263 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:33,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:33,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:33,264 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:33,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:33,473 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-15 20:22:33,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:33,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498175312] [2020-10-15 20:22:33,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:33,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498175312] [2020-10-15 20:22:33,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755033396] [2020-10-15 20:22:33,628 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 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 20:22:33,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:33,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:33,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:33,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:33,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:33,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:33,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223183224] [2020-10-15 20:22:33,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:33,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:33,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:33,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:33,769 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:34,710 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-15 20:22:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:22:34,711 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:34,712 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:22:34,712 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:22:34,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:22:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:22:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-15 20:22:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:34,715 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:34,715 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:34,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:34,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:34,716 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:34,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:34,916 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:34,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:34,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-15 20:22:34,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:34,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945480111] [2020-10-15 20:22:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945480111] [2020-10-15 20:22:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976380083] [2020-10-15 20:22:35,067 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 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 20:22:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:35,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:35,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:35,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755107543] [2020-10-15 20:22:35,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:35,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:35,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:35,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:35,138 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:35,795 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 20:22:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:35,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:35,797 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:35,797 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:35,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:22:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-15 20:22:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:22:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-15 20:22:35,800 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-15 20:22:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:35,800 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-15 20:22:35,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-15 20:22:35,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:35,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:35,801 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:36,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 20:22:36,002 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:36,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:36,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-15 20:22:36,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:36,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270294914] [2020-10-15 20:22:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:36,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270294914] [2020-10-15 20:22:36,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586069228] [2020-10-15 20:22:36,155 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 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 20:22:36,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:36,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:36,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:36,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:36,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:36,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:36,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58694245] [2020-10-15 20:22:36,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:36,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:36,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:36,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:36,235 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-15 20:22:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:37,089 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-15 20:22:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:22:37,090 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:37,090 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:22:37,090 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:22:37,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:22:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:22:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-15 20:22:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:22:37,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-15 20:22:37,092 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-15 20:22:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:37,093 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-15 20:22:37,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-15 20:22:37,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:37,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:37,094 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:37,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-15 20:22:37,294 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:37,295 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-15 20:22:37,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:37,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001153002] [2020-10-15 20:22:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:37,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001153002] [2020-10-15 20:22:37,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774261797] [2020-10-15 20:22:37,445 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 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 20:22:37,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:37,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:37,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:37,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:37,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:37,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:37,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:37,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154720928] [2020-10-15 20:22:37,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:37,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:37,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:37,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:37,532 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-15 20:22:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:38,334 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-15 20:22:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:38,335 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:38,335 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:22:38,335 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:22:38,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:22:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:22:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-15 20:22:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:22:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 20:22:38,338 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-15 20:22:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:38,338 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 20:22:38,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 20:22:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:38,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:38,338 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:38,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 20:22:38,539 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-15 20:22:38,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:38,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932768415] [2020-10-15 20:22:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:38,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932768415] [2020-10-15 20:22:38,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584572928] [2020-10-15 20:22:38,710 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 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 20:22:38,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:38,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:38,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:38,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:38,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:38,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:38,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612211671] [2020-10-15 20:22:38,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:38,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:38,794 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-15 20:22:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:39,665 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-15 20:22:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:39,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:39,666 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:39,666 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:22:39,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:22:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:22:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-15 20:22:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-15 20:22:39,669 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-15 20:22:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:39,669 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-15 20:22:39,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-15 20:22:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:39,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:39,670 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:39,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 20:22:39,870 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-15 20:22:39,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:39,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188267113] [2020-10-15 20:22:39,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188267113] [2020-10-15 20:22:40,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551795999] [2020-10-15 20:22:40,101 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 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 20:22:40,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:22:40,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:40,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:40,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:40,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:40,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740282456] [2020-10-15 20:22:40,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:40,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:40,163 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-15 20:22:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:40,558 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-15 20:22:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:40,559 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:40,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:40,560 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:22:40,560 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:22:40,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:22:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:22:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-15 20:22:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-15 20:22:40,562 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-15 20:22:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:40,562 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-15 20:22:40,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:40,563 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-15 20:22:40,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:40,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:40,563 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:40,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:40,767 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:40,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-15 20:22:40,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:40,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546793465] [2020-10-15 20:22:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546793465] [2020-10-15 20:22:40,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238737928] [2020-10-15 20:22:40,993 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 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 20:22:41,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:22:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:41,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:41,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:41,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:41,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:41,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744772145] [2020-10-15 20:22:41,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:41,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:41,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:41,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:41,084 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-15 20:22:41,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:41,464 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-15 20:22:41,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:41,465 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:41,466 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:22:41,466 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:22:41,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:22:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 20:22:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-15 20:22:41,469 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-15 20:22:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:41,469 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-15 20:22:41,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-15 20:22:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:41,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:41,470 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:41,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-15 20:22:41,673 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:41,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-15 20:22:41,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:41,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315084665] [2020-10-15 20:22:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:41,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315084665] [2020-10-15 20:22:41,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757024151] [2020-10-15 20:22:41,888 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 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 20:22:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:41,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:41,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:41,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:41,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:41,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803248291] [2020-10-15 20:22:41,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:41,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:41,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:41,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:41,945 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-15 20:22:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:42,377 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-15 20:22:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:42,378 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:42,379 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:42,379 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:42,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:42,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 20:22:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:22:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-15 20:22:42,381 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-15 20:22:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:42,382 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-15 20:22:42,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-15 20:22:42,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:42,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:42,382 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:42,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 20:22:42,590 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-15 20:22:42,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:42,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963228960] [2020-10-15 20:22:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:42,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963228960] [2020-10-15 20:22:42,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732410421] [2020-10-15 20:22:42,813 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 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 20:22:42,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:42,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:42,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:42,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:42,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:42,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:42,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:42,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822335061] [2020-10-15 20:22:42,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:42,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:42,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:42,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:42,889 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-15 20:22:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:43,364 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-15 20:22:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:43,364 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:43,365 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:22:43,365 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:22:43,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:22:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-15 20:22:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-15 20:22:43,367 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-15 20:22:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:43,368 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-15 20:22:43,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-15 20:22:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:43,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:43,369 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:43,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-15 20:22:43,569 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:43,570 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-15 20:22:43,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:43,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320257334] [2020-10-15 20:22:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:43,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320257334] [2020-10-15 20:22:43,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798137108] [2020-10-15 20:22:43,774 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 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 20:22:43,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:22:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:43,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:43,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:43,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:43,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:43,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243020459] [2020-10-15 20:22:43,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:43,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:43,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:43,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:43,844 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-15 20:22:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:44,330 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-15 20:22:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:44,330 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:44,331 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:22:44,331 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:22:44,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:22:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-15 20:22:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-15 20:22:44,333 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-15 20:22:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:44,333 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-15 20:22:44,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-15 20:22:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:44,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:44,334 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:44,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:44,540 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-15 20:22:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:44,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703208688] [2020-10-15 20:22:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:44,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703208688] [2020-10-15 20:22:44,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612041047] [2020-10-15 20:22:44,743 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 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 20:22:44,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:44,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:44,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:44,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:44,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:44,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:44,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:44,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808980322] [2020-10-15 20:22:44,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:44,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:44,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:44,824 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-15 20:22:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:45,390 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-15 20:22:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:45,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:45,391 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:22:45,391 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:22:45,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:22:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:22:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-15 20:22:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-15 20:22:45,393 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-15 20:22:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:45,393 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-15 20:22:45,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-15 20:22:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:45,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:45,394 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:45,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:45,595 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:45,596 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-15 20:22:45,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:45,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374131792] [2020-10-15 20:22:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:45,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374131792] [2020-10-15 20:22:45,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788382894] [2020-10-15 20:22:45,789 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 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 20:22:45,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:22:45,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:45,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:45,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:45,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:45,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042526035] [2020-10-15 20:22:45,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:45,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:45,857 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-15 20:22:46,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:46,396 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-15 20:22:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:46,397 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:46,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:46,397 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:22:46,397 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:22:46,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:22:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-15 20:22:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:22:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-15 20:22:46,400 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-15 20:22:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:46,400 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-15 20:22:46,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-15 20:22:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:46,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:46,401 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:46,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:46,601 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:46,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-15 20:22:46,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:46,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092429049] [2020-10-15 20:22:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:46,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092429049] [2020-10-15 20:22:46,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746070745] [2020-10-15 20:22:46,804 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 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 20:22:46,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:22:46,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:46,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:46,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:46,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:46,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:46,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431092475] [2020-10-15 20:22:46,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:46,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:46,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:46,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:46,941 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-15 20:22:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:47,599 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-15 20:22:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:47,600 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:47,601 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:22:47,601 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:22:47,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:22:47,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-15 20:22:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-15 20:22:47,604 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-15 20:22:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:47,604 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-15 20:22:47,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-15 20:22:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:47,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:47,605 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:47,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 20:22:47,814 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:47,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-15 20:22:47,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:47,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858246359] [2020-10-15 20:22:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:47,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858246359] [2020-10-15 20:22:47,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067822247] [2020-10-15 20:22:47,999 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 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 20:22:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:48,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:48,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:48,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123268455] [2020-10-15 20:22:48,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:48,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:48,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:48,061 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-15 20:22:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:48,666 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-15 20:22:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:22:48,667 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:48,668 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:22:48,668 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:22:48,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:22:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:22:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-15 20:22:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:22:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-15 20:22:48,671 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-15 20:22:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:48,671 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-15 20:22:48,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-15 20:22:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:48,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:48,672 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:48,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:48,873 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-15 20:22:48,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:48,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282490686] [2020-10-15 20:22:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:49,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282490686] [2020-10-15 20:22:49,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193559735] [2020-10-15 20:22:49,064 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 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 20:22:49,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:49,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:49,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:49,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:49,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:49,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:49,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516323527] [2020-10-15 20:22:49,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:49,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:49,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:49,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:49,153 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-15 20:22:49,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:49,878 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-15 20:22:49,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:49,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:49,880 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:22:49,880 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:22:49,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:22:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:22:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-15 20:22:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:22:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-15 20:22:49,883 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-15 20:22:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:49,883 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-15 20:22:49,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-15 20:22:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:49,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:49,884 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:50,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 20:22:50,092 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:50,092 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-15 20:22:50,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:50,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279690804] [2020-10-15 20:22:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:50,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279690804] [2020-10-15 20:22:50,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072747664] [2020-10-15 20:22:50,268 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 20:22:50,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:22:50,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:50,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:50,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:50,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:50,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890073473] [2020-10-15 20:22:50,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:50,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:50,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:50,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:50,342 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-15 20:22:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:50,988 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-15 20:22:50,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:50,989 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:50,989 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:22:50,990 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:22:50,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:22:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:22:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-15 20:22:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:50,992 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-15 20:22:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:50,992 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:50,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:50,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:50,993 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:51,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 20:22:51,194 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:51,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-15 20:22:51,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:51,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083505325] [2020-10-15 20:22:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:51,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083505325] [2020-10-15 20:22:51,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927445199] [2020-10-15 20:22:51,382 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 20:22:51,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:51,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:51,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:51,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:51,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:51,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:51,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190661261] [2020-10-15 20:22:51,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:51,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:51,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:51,476 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-15 20:22:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:52,293 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-15 20:22:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:22:52,293 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:52,294 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:22:52,294 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:22:52,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:22:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:22:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-15 20:22:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:52,296 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-15 20:22:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:52,297 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:52,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:52,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:52,298 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:52,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-15 20:22:52,498 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:52,499 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-15 20:22:52,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:52,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240233315] [2020-10-15 20:22:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:52,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240233315] [2020-10-15 20:22:52,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356629522] [2020-10-15 20:22:52,674 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 20:22:52,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:22:52,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:52,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:52,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:52,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:52,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:52,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528483789] [2020-10-15 20:22:52,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:52,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:52,751 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-15 20:22:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:53,531 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-15 20:22:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:22:53,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:53,533 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:22:53,533 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:22:53,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:22:53,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:22:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-15 20:22:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:22:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-15 20:22:53,537 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-15 20:22:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:53,537 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-15 20:22:53,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-15 20:22:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:53,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:53,539 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:53,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:53,747 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:53,748 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-15 20:22:53,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:53,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673293617] [2020-10-15 20:22:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:53,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673293617] [2020-10-15 20:22:53,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023130154] [2020-10-15 20:22:53,974 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 20:22:54,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:22:54,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:54,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:54,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:54,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:54,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:54,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:54,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201162659] [2020-10-15 20:22:54,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:54,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:54,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:54,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:54,093 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-15 20:22:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:54,970 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-15 20:22:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:22:54,970 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:54,971 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:22:54,971 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:22:54,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:22:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:22:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-15 20:22:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:22:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 20:22:54,973 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-15 20:22:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:54,974 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 20:22:54,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 20:22:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:54,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:54,974 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:55,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 20:22:55,175 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:55,175 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-15 20:22:55,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:55,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328707630] [2020-10-15 20:22:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:55,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328707630] [2020-10-15 20:22:55,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432127837] [2020-10-15 20:22:55,347 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 20:22:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:55,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:55,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:55,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:55,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724125039] [2020-10-15 20:22:55,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:55,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:55,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:55,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:55,415 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-15 20:22:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:56,180 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-15 20:22:56,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:22:56,181 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:56,182 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:22:56,182 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:22:56,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:22:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:22:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-15 20:22:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:22:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-15 20:22:56,184 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-15 20:22:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:56,185 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-15 20:22:56,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-15 20:22:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:56,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:56,185 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:56,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:56,394 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:56,394 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-15 20:22:56,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:56,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677958344] [2020-10-15 20:22:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:56,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677958344] [2020-10-15 20:22:56,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116242750] [2020-10-15 20:22:56,565 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 20:22:56,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:56,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:56,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:56,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:56,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:56,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:56,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252102495] [2020-10-15 20:22:56,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:56,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:56,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:56,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:56,645 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-15 20:22:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:57,575 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-15 20:22:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:22:57,576 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:57,577 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:57,577 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:57,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:22:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:57,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-15 20:22:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:22:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-15 20:22:57,580 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-15 20:22:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:57,580 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-15 20:22:57,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-15 20:22:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:22:57,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:57,581 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:57,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:57,782 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:57,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:57,783 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-15 20:22:57,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:57,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327574170] [2020-10-15 20:22:57,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:58,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327574170] [2020-10-15 20:22:58,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413021191] [2020-10-15 20:22:58,031 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 20:22:58,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:22:58,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:58,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:22:58,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:58,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:58,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:22:58,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437572620] [2020-10-15 20:22:58,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:58,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:58,094 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-15 20:22:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:58,521 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-15 20:22:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:58,522 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:22:58,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:58,523 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:22:58,523 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:22:58,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:22:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-15 20:22:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:22:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:22:58,525 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:22:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:58,525 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:22:58,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:22:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:22:58,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:58,526 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:58,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:58,727 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:58,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-15 20:22:58,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:58,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974799366] [2020-10-15 20:22:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:58,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974799366] [2020-10-15 20:22:58,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996927452] [2020-10-15 20:22:58,986 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 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 20:22:59,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:59,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:22:59,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:59,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:59,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:59,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:22:59,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353859913] [2020-10-15 20:22:59,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:22:59,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:22:59,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:22:59,071 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:22:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:59,614 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 20:22:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:59,615 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:22:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:59,615 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:22:59,615 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:22:59,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:59,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:22:59,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-15 20:22:59,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:22:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:22:59,618 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:22:59,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:59,618 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:22:59,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:22:59,619 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:22:59,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:22:59,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:59,619 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:59,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:59,820 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:59,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-15 20:22:59,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:59,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473020353] [2020-10-15 20:22:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:00,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473020353] [2020-10-15 20:23:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334344622] [2020-10-15 20:23:00,055 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 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 20:23:00,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:00,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:00,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:00,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:00,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189225276] [2020-10-15 20:23:00,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:00,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:00,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:00,117 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:00,625 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 20:23:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:23:00,625 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:00,626 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:23:00,626 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:23:00,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:23:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:23:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-15 20:23:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:00,629 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:00,629 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:00,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:00,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:00,630 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:00,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:00,831 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:00,831 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-15 20:23:00,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:00,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414956321] [2020-10-15 20:23:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:01,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414956321] [2020-10-15 20:23:01,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343691813] [2020-10-15 20:23:01,064 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 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 20:23:01,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:01,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:01,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:01,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:01,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:01,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:01,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63031959] [2020-10-15 20:23:01,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:01,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:01,149 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:01,755 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-15 20:23:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:01,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:01,756 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:23:01,756 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:23:01,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:23:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:23:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-15 20:23:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:01,759 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:01,759 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:01,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:01,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:01,760 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:01,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 20:23:01,961 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-15 20:23:01,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:01,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694262060] [2020-10-15 20:23:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:02,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694262060] [2020-10-15 20:23:02,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140947153] [2020-10-15 20:23:02,179 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 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 20:23:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:02,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:02,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:02,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:02,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729714187] [2020-10-15 20:23:02,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:02,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:02,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:02,238 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:02,784 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-15 20:23:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:02,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:02,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:02,786 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:02,786 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:02,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:02,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-15 20:23:02,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:02,789 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:02,789 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:02,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:02,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:02,789 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:02,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 20:23:02,993 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-15 20:23:02,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:02,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795874517] [2020-10-15 20:23:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795874517] [2020-10-15 20:23:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167708779] [2020-10-15 20:23:03,219 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 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 20:23:03,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:03,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:03,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:03,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:03,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:03,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:03,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:03,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621492602] [2020-10-15 20:23:03,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:03,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:03,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:03,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:03,302 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:04,002 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-15 20:23:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:04,002 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:04,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:04,003 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:04,003 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:04,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-15 20:23:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:04,006 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:04,006 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:04,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:04,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:04,007 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:04,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 20:23:04,214 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:04,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:04,215 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-15 20:23:04,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:04,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908409861] [2020-10-15 20:23:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:04,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908409861] [2020-10-15 20:23:04,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445160457] [2020-10-15 20:23:04,427 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 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 20:23:04,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:04,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:04,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:04,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:04,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:04,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:04,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163091827] [2020-10-15 20:23:04,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:04,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:04,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:04,502 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:05,115 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-15 20:23:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:05,116 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:05,117 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:23:05,117 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:23:05,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:23:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-15 20:23:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:05,119 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:05,120 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:05,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:05,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:05,120 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:05,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 20:23:05,321 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-15 20:23:05,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:05,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115252467] [2020-10-15 20:23:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:05,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115252467] [2020-10-15 20:23:05,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816233884] [2020-10-15 20:23:05,535 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 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 20:23:05,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:05,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:05,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:05,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:05,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:05,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:05,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072562104] [2020-10-15 20:23:05,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:05,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:05,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:05,618 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:06,397 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-15 20:23:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:06,398 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:06,399 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:23:06,399 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:23:06,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:06,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:23:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-15 20:23:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:06,401 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:06,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:06,402 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:06,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:06,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:06,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:06,402 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:06,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:06,603 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:06,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-15 20:23:06,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:06,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923880835] [2020-10-15 20:23:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:06,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923880835] [2020-10-15 20:23:06,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113758511] [2020-10-15 20:23:06,819 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 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 20:23:06,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:06,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:06,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:06,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:06,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:06,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:06,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508204652] [2020-10-15 20:23:06,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:06,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:06,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:06,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:06,893 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:07,570 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-15 20:23:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:07,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:07,572 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:23:07,572 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:23:07,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:07,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:23:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-15 20:23:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:07,575 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:07,575 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:07,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:07,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:07,576 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:07,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-15 20:23:07,776 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-15 20:23:07,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:07,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871958577] [2020-10-15 20:23:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:07,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871958577] [2020-10-15 20:23:07,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098809662] [2020-10-15 20:23:07,989 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 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 20:23:08,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:08,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:08,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:08,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:08,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:08,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:08,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172961480] [2020-10-15 20:23:08,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:08,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:08,075 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:08,954 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-15 20:23:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:08,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:08,955 INFO L225 Difference]: With dead ends: 105 [2020-10-15 20:23:08,956 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 20:23:08,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 20:23:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-15 20:23:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:08,958 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:08,958 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:08,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:08,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:08,959 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:09,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:09,160 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:09,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-15 20:23:09,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:09,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689438065] [2020-10-15 20:23:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:09,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689438065] [2020-10-15 20:23:09,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322863097] [2020-10-15 20:23:09,362 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 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 20:23:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:09,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:09,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:09,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599334151] [2020-10-15 20:23:09,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:09,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:09,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:09,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:09,434 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:10,168 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-15 20:23:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:10,169 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:10,169 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:23:10,170 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:23:10,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:23:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:23:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-15 20:23:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:10,172 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:10,172 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:10,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:10,173 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:10,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:10,173 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:10,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:10,374 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:10,374 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-15 20:23:10,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:10,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176421505] [2020-10-15 20:23:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:10,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176421505] [2020-10-15 20:23:10,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017386833] [2020-10-15 20:23:10,579 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 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 20:23:10,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:10,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:10,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:10,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:10,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:10,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:10,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066761225] [2020-10-15 20:23:10,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:10,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:10,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:10,673 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:11,640 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 20:23:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:11,640 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:11,641 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:23:11,641 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:23:11,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:23:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:23:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-15 20:23:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:11,643 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:11,644 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:11,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:11,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:11,644 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:11,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-15 20:23:11,851 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-15 20:23:11,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:11,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451501700] [2020-10-15 20:23:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:12,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451501700] [2020-10-15 20:23:12,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754951291] [2020-10-15 20:23:12,043 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 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 20:23:12,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:12,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:12,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:12,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:12,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:12,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894020917] [2020-10-15 20:23:12,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:12,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:12,113 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:12,913 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-15 20:23:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:23:12,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:12,915 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:23:12,915 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:23:12,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:23:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-15 20:23:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:12,917 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:12,918 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:12,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:12,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:12,919 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:13,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:13,119 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-15 20:23:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:13,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547435706] [2020-10-15 20:23:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:13,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547435706] [2020-10-15 20:23:13,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598292307] [2020-10-15 20:23:13,315 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 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 20:23:13,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:13,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:13,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:13,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:13,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:13,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:13,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:13,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025748591] [2020-10-15 20:23:13,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:13,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:13,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:13,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:13,400 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:14,448 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-15 20:23:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:23:14,449 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:14,449 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:23:14,450 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:23:14,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:23:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:23:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-15 20:23:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:14,452 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:14,452 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:14,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:14,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:14,453 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:14,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 20:23:14,654 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:14,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:14,654 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-15 20:23:14,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:14,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541630816] [2020-10-15 20:23:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:14,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541630816] [2020-10-15 20:23:14,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38529230] [2020-10-15 20:23:14,857 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 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 20:23:14,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:14,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:14,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:14,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:14,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:14,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088280936] [2020-10-15 20:23:14,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:14,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:14,927 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:15,781 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 20:23:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:15,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:15,783 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:15,783 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:15,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:23:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-15 20:23:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:23:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-15 20:23:15,785 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-15 20:23:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:15,786 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-15 20:23:15,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-15 20:23:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:15,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:15,786 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:15,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 20:23:15,987 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:15,988 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-15 20:23:15,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:15,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504933007] [2020-10-15 20:23:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:16,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504933007] [2020-10-15 20:23:16,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295037616] [2020-10-15 20:23:16,181 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 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 20:23:16,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:16,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:16,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:16,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:16,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:16,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:16,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134482675] [2020-10-15 20:23:16,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:16,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:16,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:16,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:16,282 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-15 20:23:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:17,404 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-15 20:23:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:23:17,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:17,405 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:23:17,405 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:23:17,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:23:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:23:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-15 20:23:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:23:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-15 20:23:17,406 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-15 20:23:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:17,406 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-15 20:23:17,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-15 20:23:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:17,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:17,407 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:17,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 20:23:17,608 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:17,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-15 20:23:17,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:17,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648471687] [2020-10-15 20:23:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:17,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648471687] [2020-10-15 20:23:17,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397872965] [2020-10-15 20:23:17,814 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 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 20:23:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:17,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:17,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:17,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:17,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070861954] [2020-10-15 20:23:17,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:17,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:17,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:17,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:17,912 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-15 20:23:18,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:18,941 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 20:23:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:18,942 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:18,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:18,942 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:23:18,943 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:23:18,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:23:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:23:18,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-15 20:23:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:23:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 20:23:18,945 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-15 20:23:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:18,945 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 20:23:18,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 20:23:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:18,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:18,945 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:19,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 20:23:19,146 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:19,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-15 20:23:19,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:19,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428988065] [2020-10-15 20:23:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:19,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428988065] [2020-10-15 20:23:19,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635444434] [2020-10-15 20:23:19,365 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 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 20:23:19,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:19,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:19,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:19,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:19,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:19,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:19,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:19,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790005449] [2020-10-15 20:23:19,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:19,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:19,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:19,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:19,459 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-15 20:23:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:20,573 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-15 20:23:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:20,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:20,575 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:23:20,575 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:23:20,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:23:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:23:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 20:23:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:23:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-15 20:23:20,577 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-15 20:23:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:20,577 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-15 20:23:20,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-15 20:23:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:20,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:20,578 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:20,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:20,779 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:20,779 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-15 20:23:20,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:20,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504520607] [2020-10-15 20:23:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:21,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504520607] [2020-10-15 20:23:21,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593378576] [2020-10-15 20:23:21,065 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 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 20:23:21,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:21,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:21,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:21,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:21,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936791404] [2020-10-15 20:23:21,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:21,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:21,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:21,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:21,127 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-15 20:23:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:21,583 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-15 20:23:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:23:21,584 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:21,585 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:23:21,585 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:23:21,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:23:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:23:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-15 20:23:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:23:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-15 20:23:21,587 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-15 20:23:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:21,587 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-15 20:23:21,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-15 20:23:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:21,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:21,588 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:21,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:21,789 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:21,789 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-15 20:23:21,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:21,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686844715] [2020-10-15 20:23:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:22,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686844715] [2020-10-15 20:23:22,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871417689] [2020-10-15 20:23:22,070 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 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 20:23:22,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:22,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:22,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:22,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:22,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:22,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301808254] [2020-10-15 20:23:22,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:22,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:22,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:22,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:22,152 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-15 20:23:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:22,646 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-15 20:23:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:23:22,647 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:22,648 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:22,648 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:22,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:23:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:22,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-15 20:23:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:23:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-15 20:23:22,651 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-15 20:23:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:22,651 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-15 20:23:22,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-15 20:23:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:22,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:22,652 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:22,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:22,852 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-15 20:23:22,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:22,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132248056] [2020-10-15 20:23:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:23,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132248056] [2020-10-15 20:23:23,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569897450] [2020-10-15 20:23:23,144 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 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 20:23:23,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:23,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:23,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:23,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:23,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:23,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:23,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57790805] [2020-10-15 20:23:23,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:23,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:23,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:23,207 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-15 20:23:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:23,760 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-15 20:23:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:23,761 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:23,761 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:23:23,762 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:23:23,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:23:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-15 20:23:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:23:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-15 20:23:23,764 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-15 20:23:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:23,764 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-15 20:23:23,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-15 20:23:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:23,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:23,765 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:23,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:23,967 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-15 20:23:23,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:23,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829297875] [2020-10-15 20:23:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:24,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829297875] [2020-10-15 20:23:24,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083144620] [2020-10-15 20:23:24,253 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 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 20:23:24,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:24,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:24,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:24,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:24,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:24,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:24,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799512041] [2020-10-15 20:23:24,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:24,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:24,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:24,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:24,341 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-15 20:23:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:24,922 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-15 20:23:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:24,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:24,924 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:23:24,924 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:23:24,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:23:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-15 20:23:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:23:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-15 20:23:24,927 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-15 20:23:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:24,927 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-15 20:23:24,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-15 20:23:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:24,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:24,928 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:25,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:25,138 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-15 20:23:25,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:25,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924303686] [2020-10-15 20:23:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:25,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924303686] [2020-10-15 20:23:25,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721155690] [2020-10-15 20:23:25,406 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 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 20:23:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:25,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:25,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:25,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:25,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891676382] [2020-10-15 20:23:25,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:25,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:25,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:25,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:25,467 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-15 20:23:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:26,088 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-15 20:23:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:26,089 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:26,089 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:23:26,089 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:23:26,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:23:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-15 20:23:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:23:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-15 20:23:26,091 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-15 20:23:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:26,092 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-15 20:23:26,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-15 20:23:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:26,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:26,092 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:26,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:26,293 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-15 20:23:26,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:26,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875245130] [2020-10-15 20:23:26,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:26,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875245130] [2020-10-15 20:23:26,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799344646] [2020-10-15 20:23:26,562 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 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 20:23:26,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:26,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:26,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:26,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:26,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:26,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:26,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768977169] [2020-10-15 20:23:26,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:26,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:26,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:26,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:26,647 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-15 20:23:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:27,344 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-15 20:23:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:27,345 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:27,346 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:23:27,346 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:23:27,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:23:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-15 20:23:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:23:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-15 20:23:27,350 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-15 20:23:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:27,350 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-15 20:23:27,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-15 20:23:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:27,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:27,350 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:27,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:27,551 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:27,552 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-15 20:23:27,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:27,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116698546] [2020-10-15 20:23:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:27,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116698546] [2020-10-15 20:23:27,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601146567] [2020-10-15 20:23:27,801 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 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 20:23:27,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:27,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:27,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:27,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:27,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:27,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894354261] [2020-10-15 20:23:27,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:27,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:27,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:27,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:27,869 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-15 20:23:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:28,537 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-15 20:23:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:28,538 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:28,538 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:23:28,538 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:23:28,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:23:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-15 20:23:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-15 20:23:28,540 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-15 20:23:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:28,540 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-15 20:23:28,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-15 20:23:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:28,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:28,541 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:28,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 20:23:28,741 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:28,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:28,742 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-15 20:23:28,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:28,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269817242] [2020-10-15 20:23:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269817242] [2020-10-15 20:23:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459637470] [2020-10-15 20:23:29,023 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 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 20:23:29,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:29,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:29,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:29,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:29,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:29,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765810075] [2020-10-15 20:23:29,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:29,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:29,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:29,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:29,118 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-15 20:23:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:29,941 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-15 20:23:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:29,942 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:29,943 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:23:29,943 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:23:29,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:23:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:23:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-15 20:23:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-15 20:23:29,946 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-15 20:23:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:29,946 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-15 20:23:29,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-15 20:23:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:29,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:29,947 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:30,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 20:23:30,147 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-15 20:23:30,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:30,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666180696] [2020-10-15 20:23:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:30,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666180696] [2020-10-15 20:23:30,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104030160] [2020-10-15 20:23:30,404 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 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 20:23:30,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:30,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:30,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:30,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:30,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:30,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:30,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716442758] [2020-10-15 20:23:30,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:30,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:30,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:30,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:30,479 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-15 20:23:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:31,270 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-15 20:23:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:31,271 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:31,272 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:23:31,272 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:23:31,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:23:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-15 20:23:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:23:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-15 20:23:31,275 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-15 20:23:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:31,275 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-15 20:23:31,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-15 20:23:31,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:31,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:31,276 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:31,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 20:23:31,477 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-15 20:23:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:31,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883432431] [2020-10-15 20:23:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:31,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883432431] [2020-10-15 20:23:31,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648049976] [2020-10-15 20:23:31,714 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 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 20:23:31,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:31,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:31,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:31,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:31,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:31,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:31,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:31,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741309777] [2020-10-15 20:23:31,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:31,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:31,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:31,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:31,809 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-15 20:23:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:32,714 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-15 20:23:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:32,714 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:32,715 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:23:32,715 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:23:32,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:23:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-15 20:23:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:23:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-15 20:23:32,717 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-15 20:23:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:32,717 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-15 20:23:32,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:32,718 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-15 20:23:32,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:32,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:32,718 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:32,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 20:23:32,919 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:32,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-15 20:23:32,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:32,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510732252] [2020-10-15 20:23:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:33,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510732252] [2020-10-15 20:23:33,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991131977] [2020-10-15 20:23:33,170 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 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 20:23:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:33,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:33,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:33,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:33,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:33,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884789581] [2020-10-15 20:23:33,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:33,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:33,235 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-15 20:23:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:34,037 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 20:23:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:23:34,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:34,039 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:23:34,039 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:23:34,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:23:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:23:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-15 20:23:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:23:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-15 20:23:34,042 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-15 20:23:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:34,042 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-15 20:23:34,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-15 20:23:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:34,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:34,042 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:34,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:34,243 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-15 20:23:34,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:34,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559315895] [2020-10-15 20:23:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:34,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559315895] [2020-10-15 20:23:34,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384791946] [2020-10-15 20:23:34,483 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 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 20:23:34,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:34,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:34,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:34,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:34,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:34,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:34,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705830460] [2020-10-15 20:23:34,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:34,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:34,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:34,571 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-15 20:23:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:35,529 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-15 20:23:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:35,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:35,530 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:23:35,530 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:23:35,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:23:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:23:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-15 20:23:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:23:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-15 20:23:35,533 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-15 20:23:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:35,533 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-15 20:23:35,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-15 20:23:35,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:35,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:35,534 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:35,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:35,734 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:35,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:35,735 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-15 20:23:35,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:35,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431276151] [2020-10-15 20:23:35,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:35,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431276151] [2020-10-15 20:23:35,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214211656] [2020-10-15 20:23:35,963 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 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 20:23:36,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:36,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:36,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:36,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:36,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:36,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:36,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954260350] [2020-10-15 20:23:36,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:36,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:36,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:36,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:36,039 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-15 20:23:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:36,903 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 20:23:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:36,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:36,905 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:23:36,905 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:23:36,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:23:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:23:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-15 20:23:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:36,907 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-15 20:23:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:36,908 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:36,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:36,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:36,908 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:37,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-15 20:23:37,109 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-15 20:23:37,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:37,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399645559] [2020-10-15 20:23:37,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:37,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399645559] [2020-10-15 20:23:37,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131792036] [2020-10-15 20:23:37,344 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 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 20:23:37,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:37,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:37,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:37,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:37,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:37,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:37,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79174878] [2020-10-15 20:23:37,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:37,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:37,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:37,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:37,453 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-15 20:23:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:38,606 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 20:23:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:23:38,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:38,608 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:23:38,608 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:23:38,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:23:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:23:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-15 20:23:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:38,610 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-15 20:23:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:38,610 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:38,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:38,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:38,611 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:38,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:38,815 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:38,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-15 20:23:38,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:38,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039886325] [2020-10-15 20:23:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:39,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039886325] [2020-10-15 20:23:39,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948566745] [2020-10-15 20:23:39,036 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 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 20:23:39,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:39,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:39,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:39,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:39,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:39,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946242478] [2020-10-15 20:23:39,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:39,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:39,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:39,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:39,108 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-15 20:23:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:40,040 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-15 20:23:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:23:40,041 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:40,042 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:23:40,043 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:23:40,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:23:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:23:40,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-15 20:23:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:23:40,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-15 20:23:40,045 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-15 20:23:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:40,046 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-15 20:23:40,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-15 20:23:40,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:40,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:40,046 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:40,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:40,255 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:40,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-15 20:23:40,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:40,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100860103] [2020-10-15 20:23:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:40,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100860103] [2020-10-15 20:23:40,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743583076] [2020-10-15 20:23:40,479 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 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 20:23:40,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:40,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:40,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:40,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:40,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:40,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:40,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536914412] [2020-10-15 20:23:40,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:40,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:40,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:40,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:40,586 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-15 20:23:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:41,789 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-15 20:23:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:23:41,789 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:41,790 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:23:41,790 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:23:41,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:23:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:23:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-15 20:23:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:23:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 20:23:41,793 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-15 20:23:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:41,793 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 20:23:41,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 20:23:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:41,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:41,793 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:41,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:41,994 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:41,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-15 20:23:41,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:41,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373436604] [2020-10-15 20:23:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:42,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373436604] [2020-10-15 20:23:42,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250123001] [2020-10-15 20:23:42,216 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 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 20:23:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:42,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:42,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:42,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:42,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532090437] [2020-10-15 20:23:42,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:42,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:42,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:42,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:42,285 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-15 20:23:43,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:43,303 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 20:23:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:23:43,303 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:43,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:43,304 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:23:43,304 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:23:43,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:23:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:23:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-15 20:23:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:23:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-15 20:23:43,309 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-15 20:23:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:43,310 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-15 20:23:43,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-15 20:23:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:43,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:43,310 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:43,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:43,520 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-15 20:23:43,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:43,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104199390] [2020-10-15 20:23:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:43,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104199390] [2020-10-15 20:23:43,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963342348] [2020-10-15 20:23:43,746 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 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 20:23:43,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:43,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:43,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:43,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:43,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:43,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:43,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298172410] [2020-10-15 20:23:43,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:43,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:43,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:43,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:43,833 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-15 20:23:45,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:45,017 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-15 20:23:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:23:45,018 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:45,018 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:23:45,018 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:23:45,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:23:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:23:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-15 20:23:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:23:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-15 20:23:45,021 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-15 20:23:45,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:45,022 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-15 20:23:45,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-15 20:23:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:45,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:45,022 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:45,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:45,223 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-15 20:23:45,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:45,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615116748] [2020-10-15 20:23:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:45,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615116748] [2020-10-15 20:23:45,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119830649] [2020-10-15 20:23:45,532 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 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 20:23:45,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:45,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:45,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:45,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:45,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:45,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899531214] [2020-10-15 20:23:45,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:45,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:45,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:45,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:45,601 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-15 20:23:46,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:46,174 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-15 20:23:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:23:46,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:46,175 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:23:46,175 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:23:46,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:23:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-15 20:23:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:46,178 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:46,178 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:46,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:46,178 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:46,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:46,178 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:46,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-15 20:23:46,379 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:46,380 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-15 20:23:46,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:46,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217801445] [2020-10-15 20:23:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:46,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217801445] [2020-10-15 20:23:46,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185202539] [2020-10-15 20:23:46,700 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 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 20:23:46,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:46,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:46,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:46,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:46,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:46,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:46,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:46,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595074699] [2020-10-15 20:23:46,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:46,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:46,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:46,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:46,796 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:47,452 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-15 20:23:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:47,453 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:47,454 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:23:47,454 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:23:47,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:23:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-15 20:23:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:47,457 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:47,457 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:47,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:47,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:47,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:47,458 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:47,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 20:23:47,659 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-15 20:23:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:47,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245527535] [2020-10-15 20:23:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:47,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245527535] [2020-10-15 20:23:47,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839488005] [2020-10-15 20:23:47,967 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 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 20:23:48,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:48,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:48,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:48,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:48,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:48,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:48,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451839480] [2020-10-15 20:23:48,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:48,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:48,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:48,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:48,041 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:23:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:48,687 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-15 20:23:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:48,689 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:48,689 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:23:48,689 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:23:48,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:23:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-15 20:23:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:48,692 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:48,692 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:48,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:48,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:48,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:48,693 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:48,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:48,894 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:48,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:48,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-15 20:23:48,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:48,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608097698] [2020-10-15 20:23:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:49,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608097698] [2020-10-15 20:23:49,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245728745] [2020-10-15 20:23:49,202 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 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 20:23:49,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:49,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:49,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:49,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:49,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:49,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:49,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:49,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917886327] [2020-10-15 20:23:49,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:49,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:49,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:49,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:49,296 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:50,065 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-15 20:23:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:50,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:50,067 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:23:50,067 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:23:50,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:23:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-15 20:23:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:50,070 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:50,070 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:50,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:50,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:50,071 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:50,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-15 20:23:50,271 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-15 20:23:50,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:50,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389579858] [2020-10-15 20:23:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:50,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389579858] [2020-10-15 20:23:50,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069746165] [2020-10-15 20:23:50,555 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 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 20:23:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:50,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:50,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:50,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473171094] [2020-10-15 20:23:50,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:50,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:50,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:50,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:50,625 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:23:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:51,342 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-15 20:23:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:51,343 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:51,344 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:23:51,344 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:23:51,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:23:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-15 20:23:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:51,346 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:51,347 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:51,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:51,347 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:51,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:51,347 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:51,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:51,548 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:51,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-15 20:23:51,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:51,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954444971] [2020-10-15 20:23:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:51,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954444971] [2020-10-15 20:23:51,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974344432] [2020-10-15 20:23:51,842 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 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 20:23:51,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:51,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:51,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:51,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:51,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:51,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:51,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:51,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686429236] [2020-10-15 20:23:51,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:51,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:51,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:51,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:51,925 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:52,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:52,770 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-15 20:23:52,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:52,771 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:52,772 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:23:52,772 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:23:52,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:23:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-15 20:23:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:52,774 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:52,775 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:52,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:52,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:52,775 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:52,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:52,976 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-15 20:23:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:52,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490845834] [2020-10-15 20:23:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:53,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490845834] [2020-10-15 20:23:53,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520233529] [2020-10-15 20:23:53,254 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 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 20:23:53,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:53,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:53,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:53,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:53,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:53,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107034490] [2020-10-15 20:23:53,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:53,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:53,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:53,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:53,325 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:23:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:54,147 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 20:23:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:54,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:54,149 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:23:54,149 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:23:54,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:23:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:23:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-15 20:23:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:54,152 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:54,152 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:54,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:54,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:54,153 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:54,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:54,353 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:54,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:54,354 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-15 20:23:54,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:54,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853192694] [2020-10-15 20:23:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:54,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853192694] [2020-10-15 20:23:54,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672661674] [2020-10-15 20:23:54,654 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 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 20:23:54,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:54,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:54,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:54,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:54,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:54,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:54,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:54,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582687495] [2020-10-15 20:23:54,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:54,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:54,748 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:55,713 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-15 20:23:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:55,714 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:55,714 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:23:55,715 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:23:55,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:23:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:23:55,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-15 20:23:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:55,717 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:55,718 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:55,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:55,718 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:55,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:55,718 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:55,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:55,919 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:55,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:55,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-15 20:23:55,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:55,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359951106] [2020-10-15 20:23:55,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359951106] [2020-10-15 20:23:56,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877234714] [2020-10-15 20:23:56,192 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 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 20:23:56,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:56,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:56,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:56,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:56,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:56,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282042764] [2020-10-15 20:23:56,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:56,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:56,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:56,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:56,259 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:23:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:57,102 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-15 20:23:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:57,103 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:57,104 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:23:57,104 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:23:57,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:23:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-15 20:23:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:57,107 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:57,107 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:57,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:57,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:57,107 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:57,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-15 20:23:57,308 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:57,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:57,309 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-15 20:23:57,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:57,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823488241] [2020-10-15 20:23:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:57,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823488241] [2020-10-15 20:23:57,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677540728] [2020-10-15 20:23:57,585 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 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 20:23:57,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:57,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:57,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:57,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:57,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:57,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:57,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100645618] [2020-10-15 20:23:57,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:57,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:57,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:57,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:57,679 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:58,764 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-15 20:23:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:58,765 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:58,766 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:23:58,766 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:23:58,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:23:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:23:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-15 20:23:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:58,770 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:58,770 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:58,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:58,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:58,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:58,771 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:58,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:58,980 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:58,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:58,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-15 20:23:58,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:58,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793463951] [2020-10-15 20:23:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:59,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793463951] [2020-10-15 20:23:59,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356715704] [2020-10-15 20:23:59,243 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 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 20:23:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:59,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:59,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:59,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:59,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355580220] [2020-10-15 20:23:59,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:59,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:59,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:59,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:59,315 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:00,235 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-15 20:24:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:24:00,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:00,237 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:24:00,237 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:24:00,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:24:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:24:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-15 20:24:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:00,240 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:00,240 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:00,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:00,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:00,241 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:00,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-15 20:24:00,441 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-15 20:24:00,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:00,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64302767] [2020-10-15 20:24:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:00,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64302767] [2020-10-15 20:24:00,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457252142] [2020-10-15 20:24:00,710 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 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 20:24:00,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:00,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:00,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:00,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:00,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:00,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:00,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447752330] [2020-10-15 20:24:00,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:00,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:00,809 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:01,971 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-15 20:24:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:24:01,972 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:01,972 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:24:01,972 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:24:01,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:24:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:24:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-15 20:24:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:01,975 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:01,976 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:01,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:01,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:01,976 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:02,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 20:24:02,177 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-15 20:24:02,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:02,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356872219] [2020-10-15 20:24:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:02,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356872219] [2020-10-15 20:24:02,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782279008] [2020-10-15 20:24:02,439 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 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 20:24:02,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:02,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:02,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:02,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:02,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283848974] [2020-10-15 20:24:02,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:02,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:02,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:02,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:02,517 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:03,503 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 20:24:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:24:03,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:03,504 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:24:03,505 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:24:03,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:24:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:24:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-15 20:24:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:03,507 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:03,507 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:03,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:03,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:03,508 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:03,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:03,711 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:03,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-15 20:24:03,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:03,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474273813] [2020-10-15 20:24:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:03,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474273813] [2020-10-15 20:24:03,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648991193] [2020-10-15 20:24:03,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:24:04,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:04,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:04,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:04,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:04,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:04,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:04,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:04,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377778988] [2020-10-15 20:24:04,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:04,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:04,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:04,069 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:05,350 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 20:24:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:24:05,351 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:05,352 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:24:05,352 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:24:05,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:24:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:24:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-15 20:24:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:05,355 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:05,356 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:05,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:05,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:05,357 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:05,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:05,562 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:05,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:05,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-15 20:24:05,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:05,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136058398] [2020-10-15 20:24:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:05,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136058398] [2020-10-15 20:24:05,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872171112] [2020-10-15 20:24:05,818 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 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 20:24:05,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:05,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:05,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:05,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:05,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:05,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:05,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276648719] [2020-10-15 20:24:05,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:05,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:05,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:05,900 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:06,959 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-15 20:24:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:24:06,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:06,961 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:24:06,961 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:24:06,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:24:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:24:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-15 20:24:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:06,964 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:06,964 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:06,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:06,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:06,965 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:07,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:07,165 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:07,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:07,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-15 20:24:07,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:07,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006600231] [2020-10-15 20:24:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:07,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006600231] [2020-10-15 20:24:07,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702429118] [2020-10-15 20:24:07,424 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 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 20:24:07,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:07,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:07,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:07,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:07,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:07,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:07,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687332885] [2020-10-15 20:24:07,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:07,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:07,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:07,532 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:08,927 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-15 20:24:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:24:08,928 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:08,929 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:24:08,929 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:24:08,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:24:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:24:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-15 20:24:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:08,932 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:08,932 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:08,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:08,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:08,933 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:09,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-15 20:24:09,142 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:09,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-15 20:24:09,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:09,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640687374] [2020-10-15 20:24:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:09,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640687374] [2020-10-15 20:24:09,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179659022] [2020-10-15 20:24:09,409 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 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 20:24:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:09,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:09,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:09,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:09,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618061612] [2020-10-15 20:24:09,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:09,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:09,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:09,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:09,486 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:10,651 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 20:24:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:10,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:10,655 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:24:10,655 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:24:10,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:24:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:24:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-15 20:24:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:24:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-15 20:24:10,657 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-15 20:24:10,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:10,658 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-15 20:24:10,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-15 20:24:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:10,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:10,658 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:10,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:10,859 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:10,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-15 20:24:10,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:10,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312730601] [2020-10-15 20:24:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:11,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312730601] [2020-10-15 20:24:11,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739933409] [2020-10-15 20:24:11,122 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 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 20:24:11,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:11,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:11,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:11,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:11,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:11,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361582224] [2020-10-15 20:24:11,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:11,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:11,220 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-15 20:24:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:12,659 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-15 20:24:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:24:12,660 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:12,660 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:24:12,660 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:24:12,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:24:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-15 20:24:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:24:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-15 20:24:12,663 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-15 20:24:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:12,663 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-15 20:24:12,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-15 20:24:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:12,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:12,664 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:12,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:12,873 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-15 20:24:12,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:12,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983566730] [2020-10-15 20:24:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:13,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983566730] [2020-10-15 20:24:13,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834109941] [2020-10-15 20:24:13,136 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 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 20:24:13,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:13,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:13,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:13,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:13,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:24:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:13,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:13,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:13,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966253787] [2020-10-15 20:24:13,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:13,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:13,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:13,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:13,244 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-15 20:24:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:14,613 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-15 20:24:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:14,614 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:14,614 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:24:14,614 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:24:14,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:24:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-15 20:24:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:24:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 20:24:14,616 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-15 20:24:14,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:14,616 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 20:24:14,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 20:24:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:14,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:14,617 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:14,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:14,818 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:14,819 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-15 20:24:14,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:14,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58114299] [2020-10-15 20:24:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:15,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58114299] [2020-10-15 20:24:15,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263755115] [2020-10-15 20:24:15,106 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 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 20:24:15,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:15,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:15,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:15,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:15,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:24:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:15,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:15,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:15,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563808287] [2020-10-15 20:24:15,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:15,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:15,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:15,209 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-15 20:24:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:16,667 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-15 20:24:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:16,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:16,668 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:24:16,668 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:24:16,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:24:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:24:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-15 20:24:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:24:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-15 20:24:16,671 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-15 20:24:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:16,671 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-15 20:24:16,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-15 20:24:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:16,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:16,672 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:16,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:16,872 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-15 20:24:16,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:16,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73307154] [2020-10-15 20:24:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:17,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73307154] [2020-10-15 20:24:17,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076616576] [2020-10-15 20:24:17,240 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 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 20:24:17,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:17,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:17,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:17,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:17,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:17,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:17,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322364686] [2020-10-15 20:24:17,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:17,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:17,304 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-15 20:24:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:17,905 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-15 20:24:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:24:17,905 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:17,906 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:24:17,906 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:24:17,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:24:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:24:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-15 20:24:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:24:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-15 20:24:17,909 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-15 20:24:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:17,909 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-15 20:24:17,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:17,909 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-15 20:24:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:17,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:17,909 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:18,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-15 20:24:18,110 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-15 20:24:18,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:18,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265275839] [2020-10-15 20:24:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:18,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265275839] [2020-10-15 20:24:18,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078820827] [2020-10-15 20:24:18,476 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 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 20:24:18,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:18,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:18,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:18,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:18,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:18,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:18,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:18,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482532310] [2020-10-15 20:24:18,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:18,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:18,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:18,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:18,577 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-15 20:24:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:19,295 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-15 20:24:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:24:19,296 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:19,297 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:24:19,297 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:24:19,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:24:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:24:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-15 20:24:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:24:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-15 20:24:19,299 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-15 20:24:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:19,299 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-15 20:24:19,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-15 20:24:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:19,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:19,300 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:19,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 20:24:19,501 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:19,502 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-15 20:24:19,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:19,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673373419] [2020-10-15 20:24:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:19,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673373419] [2020-10-15 20:24:19,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280624739] [2020-10-15 20:24:19,866 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 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 20:24:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:19,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:19,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:19,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:19,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:19,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085800232] [2020-10-15 20:24:19,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:19,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:19,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:19,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:19,933 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-15 20:24:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:20,657 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-15 20:24:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:24:20,658 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:20,659 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:24:20,659 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:20,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:24:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-15 20:24:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:24:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-15 20:24:20,661 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-15 20:24:20,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:20,662 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-15 20:24:20,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-15 20:24:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:20,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:20,662 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:20,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 20:24:20,863 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:20,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:20,864 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-15 20:24:20,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:20,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991168697] [2020-10-15 20:24:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:21,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991168697] [2020-10-15 20:24:21,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014273869] [2020-10-15 20:24:21,227 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 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 20:24:21,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:21,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:21,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:21,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:21,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:21,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159482981] [2020-10-15 20:24:21,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:21,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:21,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:21,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:21,313 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-15 20:24:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:22,092 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-15 20:24:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:24:22,093 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:22,094 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:24:22,094 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:24:22,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:24:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:24:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-15 20:24:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:24:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-15 20:24:22,097 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-15 20:24:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:22,097 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-15 20:24:22,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-15 20:24:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:22,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:22,098 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:22,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 20:24:22,298 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:22,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:22,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-15 20:24:22,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:22,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808245653] [2020-10-15 20:24:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:22,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808245653] [2020-10-15 20:24:22,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267865889] [2020-10-15 20:24:22,650 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 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 20:24:22,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:24:22,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:22,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:22,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:22,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:22,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:22,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37834674] [2020-10-15 20:24:22,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:22,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:22,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:22,718 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-15 20:24:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:23,536 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-15 20:24:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:24:23,537 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:23,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:23,538 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:24:23,538 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:24:23,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:24:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:24:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-15 20:24:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:24:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-15 20:24:23,540 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-15 20:24:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:23,541 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-15 20:24:23,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-15 20:24:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:23,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:23,541 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:23,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:23,742 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:23,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-15 20:24:23,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:23,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440014426] [2020-10-15 20:24:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:24,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440014426] [2020-10-15 20:24:24,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852248324] [2020-10-15 20:24:24,110 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 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 20:24:24,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:24,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:24,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:24,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:24,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:24,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:24,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534062322] [2020-10-15 20:24:24,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:24,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:24,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:24,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:24,205 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-15 20:24:25,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:25,115 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-15 20:24:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:24:25,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:25,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:25,116 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:24:25,117 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:24:25,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:24:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:24:25,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-15 20:24:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:24:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-15 20:24:25,119 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-15 20:24:25,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:25,119 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-15 20:24:25,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:25,119 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-15 20:24:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:25,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:25,120 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:25,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 20:24:25,320 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-15 20:24:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:25,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648199327] [2020-10-15 20:24:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:25,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648199327] [2020-10-15 20:24:25,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502443099] [2020-10-15 20:24:25,662 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 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 20:24:25,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:25,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:25,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:25,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:25,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:25,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:25,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395638482] [2020-10-15 20:24:25,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:25,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:25,734 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-15 20:24:26,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:26,638 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-15 20:24:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:24:26,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:26,639 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:24:26,640 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:24:26,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:24:26,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:24:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-15 20:24:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:24:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-15 20:24:26,643 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-15 20:24:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:26,643 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-15 20:24:26,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-15 20:24:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:26,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:26,643 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:26,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:26,844 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-15 20:24:26,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:26,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107794299] [2020-10-15 20:24:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107794299] [2020-10-15 20:24:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813782068] [2020-10-15 20:24:27,192 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 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 20:24:27,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:27,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:27,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:27,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:27,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:27,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:27,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:27,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728114631] [2020-10-15 20:24:27,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:27,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:27,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:27,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:27,289 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-15 20:24:28,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:28,289 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-15 20:24:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:24:28,290 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:28,291 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:24:28,291 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:24:28,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:24:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:24:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-15 20:24:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:24:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-15 20:24:28,296 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-15 20:24:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:28,296 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-15 20:24:28,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-15 20:24:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:28,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:28,297 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:28,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-15 20:24:28,497 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:28,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:28,498 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-15 20:24:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:28,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307987320] [2020-10-15 20:24:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:28,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307987320] [2020-10-15 20:24:28,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332811138] [2020-10-15 20:24:28,834 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 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 20:24:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:28,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:28,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:28,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361569602] [2020-10-15 20:24:28,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:28,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:28,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:28,911 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-15 20:24:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:29,857 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-15 20:24:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:24:29,858 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:29,859 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:24:29,859 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:24:29,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:24:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:24:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-15 20:24:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:24:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-15 20:24:29,862 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-15 20:24:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:29,862 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-15 20:24:29,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-15 20:24:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:29,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:29,862 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:30,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:30,063 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:30,064 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-15 20:24:30,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:30,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099941776] [2020-10-15 20:24:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:30,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099941776] [2020-10-15 20:24:30,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370026759] [2020-10-15 20:24:30,396 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 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 20:24:30,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:30,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:30,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:30,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:30,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865486992] [2020-10-15 20:24:30,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:30,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:30,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:30,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:30,496 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-15 20:24:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:31,602 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-15 20:24:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:24:31,603 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:31,604 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:24:31,604 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:24:31,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:24:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:24:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-15 20:24:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:24:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-15 20:24:31,606 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-15 20:24:31,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:31,607 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-15 20:24:31,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-15 20:24:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:31,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:31,607 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:31,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:31,808 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:31,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:31,809 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-15 20:24:31,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:31,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836735702] [2020-10-15 20:24:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:32,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836735702] [2020-10-15 20:24:32,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794496140] [2020-10-15 20:24:32,133 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 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 20:24:32,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:24:32,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:32,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:32,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:32,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:32,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942206480] [2020-10-15 20:24:32,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:32,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:32,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:32,210 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-15 20:24:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:33,225 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-15 20:24:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:24:33,226 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:33,226 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:24:33,226 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:24:33,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:24:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:24:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-15 20:24:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:24:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-15 20:24:33,228 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-15 20:24:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:33,229 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-15 20:24:33,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-15 20:24:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:33,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:33,229 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:33,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:33,430 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:33,431 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-15 20:24:33,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:33,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088020008] [2020-10-15 20:24:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:33,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088020008] [2020-10-15 20:24:33,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660522745] [2020-10-15 20:24:33,760 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 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 20:24:33,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:33,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:33,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:33,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:33,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:33,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:33,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574842430] [2020-10-15 20:24:33,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:33,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:33,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:33,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:33,858 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-15 20:24:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:35,086 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-15 20:24:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:24:35,087 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:35,088 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:24:35,088 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:24:35,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:24:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:24:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-15 20:24:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:24:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-15 20:24:35,091 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-15 20:24:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:35,092 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-15 20:24:35,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-15 20:24:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:35,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:35,092 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:35,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:35,301 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-15 20:24:35,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:35,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327692632] [2020-10-15 20:24:35,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:35,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327692632] [2020-10-15 20:24:35,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527140232] [2020-10-15 20:24:35,619 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 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 20:24:35,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:35,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:35,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:35,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:35,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:35,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:35,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383457366] [2020-10-15 20:24:35,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:35,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:35,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:35,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:35,717 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-15 20:24:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:36,819 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-15 20:24:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:24:36,820 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:36,821 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:24:36,821 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:24:36,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:24:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:24:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-15 20:24:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:24:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-15 20:24:36,823 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-15 20:24:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:36,824 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-15 20:24:36,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-15 20:24:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:36,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:36,824 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:37,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 20:24:37,025 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-15 20:24:37,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:37,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925785684] [2020-10-15 20:24:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:37,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925785684] [2020-10-15 20:24:37,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050166491] [2020-10-15 20:24:37,351 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 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 20:24:37,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:37,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:37,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:37,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:37,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:37,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:37,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060726327] [2020-10-15 20:24:37,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:37,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:37,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:37,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:37,455 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-15 20:24:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:38,800 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-15 20:24:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:24:38,801 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:38,802 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:24:38,802 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:24:38,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:24:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:24:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-15 20:24:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:24:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-15 20:24:38,804 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-15 20:24:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:38,804 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-15 20:24:38,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:38,804 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-15 20:24:38,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:38,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:38,804 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:39,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-15 20:24:39,005 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:39,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-15 20:24:39,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:39,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633820647] [2020-10-15 20:24:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:39,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633820647] [2020-10-15 20:24:39,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082861494] [2020-10-15 20:24:39,323 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 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 20:24:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:39,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:39,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:39,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:39,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:39,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52862657] [2020-10-15 20:24:39,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:39,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:39,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:39,397 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-15 20:24:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:40,572 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-15 20:24:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:40,573 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:40,574 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:24:40,574 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:24:40,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:24:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:24:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-15 20:24:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:40,577 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-15 20:24:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:40,577 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:40,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:40,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:40,577 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:40,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 20:24:40,778 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:40,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-15 20:24:40,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:40,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565912021] [2020-10-15 20:24:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:41,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565912021] [2020-10-15 20:24:41,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050438588] [2020-10-15 20:24:41,103 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 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 20:24:41,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:41,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:41,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:41,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:41,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:41,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:41,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:41,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724186959] [2020-10-15 20:24:41,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:41,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:41,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:41,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:41,206 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-15 20:24:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:42,671 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-15 20:24:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:24:42,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:42,673 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:24:42,673 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:24:42,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:24:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:24:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-15 20:24:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:42,675 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-15 20:24:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:42,676 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:42,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:42,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:42,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:42,676 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:42,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 20:24:42,877 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:42,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-15 20:24:42,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:42,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364146106] [2020-10-15 20:24:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:43,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364146106] [2020-10-15 20:24:43,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688896150] [2020-10-15 20:24:43,193 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 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 20:24:43,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:24:43,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:43,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:43,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:43,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:43,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:43,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980993772] [2020-10-15 20:24:43,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:43,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:43,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:43,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:43,277 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-15 20:24:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:44,549 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-15 20:24:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:24:44,550 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:44,550 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:24:44,550 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:24:44,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:24:44,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-15 20:24:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:24:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-15 20:24:44,557 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-15 20:24:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:44,557 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-15 20:24:44,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-15 20:24:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:44,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:44,558 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:44,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:44,758 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:44,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:44,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-15 20:24:44,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:44,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218164904] [2020-10-15 20:24:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:45,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218164904] [2020-10-15 20:24:45,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186931672] [2020-10-15 20:24:45,060 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 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 20:24:45,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:45,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:45,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:45,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:45,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:45,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:45,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:45,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637079195] [2020-10-15 20:24:45,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:45,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:45,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:45,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:45,165 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-15 20:24:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:46,747 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-15 20:24:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:24:46,748 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:46,749 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:24:46,749 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:24:46,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:24:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:24:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-15 20:24:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:24:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 20:24:46,751 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-15 20:24:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:46,751 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 20:24:46,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 20:24:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:46,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:46,752 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:46,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 20:24:46,953 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:46,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-15 20:24:46,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:46,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789880078] [2020-10-15 20:24:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:47,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789880078] [2020-10-15 20:24:47,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865780591] [2020-10-15 20:24:47,273 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 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 20:24:47,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:47,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:47,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:47,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:47,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:47,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:47,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130960275] [2020-10-15 20:24:47,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:47,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:47,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:47,356 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-15 20:24:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:48,713 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-15 20:24:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:24:48,722 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:48,723 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:24:48,723 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:24:48,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:24:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:24:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-15 20:24:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:24:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-15 20:24:48,725 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-15 20:24:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:48,726 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-15 20:24:48,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-15 20:24:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:48,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:48,726 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:48,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:48,936 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-15 20:24:48,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:48,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385216342] [2020-10-15 20:24:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:49,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385216342] [2020-10-15 20:24:49,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179577758] [2020-10-15 20:24:49,258 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 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 20:24:49,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:49,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:49,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:49,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:49,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:49,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633626334] [2020-10-15 20:24:49,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:49,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:49,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:49,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:49,372 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-15 20:24:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:51,039 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-15 20:24:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:24:51,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:51,040 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:24:51,041 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:51,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:24:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-15 20:24:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:24:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-15 20:24:51,043 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-15 20:24:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:51,043 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-15 20:24:51,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-15 20:24:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:24:51,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:51,044 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:51,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-15 20:24:51,245 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:51,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-15 20:24:51,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:51,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439069875] [2020-10-15 20:24:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 20:24:51,255 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 20:24:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 20:24:51,265 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 20:24:51,291 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-15 20:24:51,291 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 20:24:51,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2020-10-15 20:24:51,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:24:51 BasicIcfg [2020-10-15 20:24:51,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 20:24:51,377 INFO L168 Benchmark]: Toolchain (without parser) took 230628.17 ms. Allocated memory was 253.2 MB in the beginning and 295.2 MB in the end (delta: 41.9 MB). Free memory was 208.6 MB in the beginning and 206.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 44.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:24:51,377 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 253.2 MB. Free memory was 231.3 MB in the beginning and 230.4 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. [2020-10-15 20:24:51,378 INFO L168 Benchmark]: CACSL2BoogieTranslator took 667.09 ms. Allocated memory was 253.2 MB in the beginning and 319.8 MB in the end (delta: 66.6 MB). Free memory was 208.6 MB in the beginning and 276.5 MB in the end (delta: -68.0 MB). Peak memory consumption was 30.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:24:51,378 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.48 ms. Allocated memory is still 319.8 MB. Free memory was 276.5 MB in the beginning and 274.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:24:51,378 INFO L168 Benchmark]: Boogie Preprocessor took 30.30 ms. Allocated memory is still 319.8 MB. Free memory was 274.0 MB in the beginning and 272.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-15 20:24:51,379 INFO L168 Benchmark]: RCFGBuilder took 398.29 ms. Allocated memory is still 319.8 MB. Free memory was 272.3 MB in the beginning and 252.0 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 14.2 GB. [2020-10-15 20:24:51,379 INFO L168 Benchmark]: TraceAbstraction took 229472.61 ms. Allocated memory was 319.8 MB in the beginning and 295.2 MB in the end (delta: -24.6 MB). Free memory was 251.2 MB in the beginning and 206.0 MB in the end (delta: 45.2 MB). Peak memory consumption was 20.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:24:51,381 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 253.2 MB. Free memory was 231.3 MB in the beginning and 230.4 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 667.09 ms. Allocated memory was 253.2 MB in the beginning and 319.8 MB in the end (delta: 66.6 MB). Free memory was 208.6 MB in the beginning and 276.5 MB in the end (delta: -68.0 MB). Peak memory consumption was 30.5 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 54.48 ms. Allocated memory is still 319.8 MB. Free memory was 276.5 MB in the beginning and 274.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 30.30 ms. Allocated memory is still 319.8 MB. Free memory was 274.0 MB in the beginning and 272.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 398.29 ms. Allocated memory is still 319.8 MB. Free memory was 272.3 MB in the beginning and 252.0 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 229472.61 ms. Allocated memory was 319.8 MB in the beginning and 295.2 MB in the end (delta: -24.6 MB). Free memory was 251.2 MB in the beginning and 206.0 MB in the end (delta: 45.2 MB). Peak memory consumption was 20.5 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L700] 0 int condJ = j >= (2*10 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 229.2s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 128.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3496 SDtfs, 12305 SDslu, 22147 SDs, 0 SdLazy, 24060 SolverSat, 13833 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11878 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75950 ImplicationChecksByTransitivity, 130.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 218 MinimizatonAttempts, 5507 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 42.3s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2751 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3605 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...