/usr/bin/java -Xmx8000000000 -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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 01:18:34,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 01:18:34,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 01:18:34,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 01:18:34,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 01:18:34,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 01:18:34,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 01:18:34,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 01:18:34,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 01:18:34,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 01:18:34,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 01:18:34,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 01:18:34,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 01:18:34,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 01:18:34,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 01:18:34,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 01:18:34,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 01:18:34,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 01:18:34,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 01:18:34,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 01:18:34,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 01:18:34,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 01:18:34,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 01:18:34,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 01:18:34,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 01:18:34,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 01:18:34,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 01:18:34,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 01:18:34,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 01:18:34,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 01:18:34,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 01:18:34,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 01:18:34,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 01:18:34,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 01:18:34,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 01:18:34,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 01:18:34,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-15 01:18:34,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 01:18:34,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 01:18:34,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 01:18:34,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 01:18:34,522 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 01:18:34,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 01:18:34,522 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 01:18:34,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 01:18:34,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 01:18:34,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 01:18:34,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 01:18:34,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 01:18:34,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 01:18:34,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 01:18:34,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 01:18:34,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 01:18:34,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 01:18:34,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 01:18:34,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 01:18:34,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 01:18:34,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 01:18:34,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 01:18:34,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 01:18:34,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 01:18:34,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 01:18:34,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 01:18:34,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 01:18:34,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 01:18:34,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 01:18:35,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 01:18:35,098 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 01:18:35,103 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 01:18:35,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 01:18:35,106 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 01:18:35,107 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-09-15 01:18:35,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80e4ba770/75b852d50b6d49cd926300791e836754/FLAG9657c5fcf [2020-09-15 01:18:35,851 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 01:18:35,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-09-15 01:18:35,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80e4ba770/75b852d50b6d49cd926300791e836754/FLAG9657c5fcf [2020-09-15 01:18:36,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80e4ba770/75b852d50b6d49cd926300791e836754 [2020-09-15 01:18:36,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 01:18:36,145 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 01:18:36,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 01:18:36,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 01:18:36,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 01:18:36,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:36,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25fd8714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36, skipping insertion in model container [2020-09-15 01:18:36,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:36,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 01:18:36,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 01:18:36,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:18:36,816 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 01:18:36,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:18:36,992 INFO L208 MainTranslator]: Completed translation [2020-09-15 01:18:36,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36 WrapperNode [2020-09-15 01:18:36,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 01:18:36,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 01:18:36,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 01:18:36,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 01:18:37,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:37,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:37,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 01:18:37,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 01:18:37,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 01:18:37,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 01:18:37,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:37,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:37,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:37,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:37,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:37,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:37,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... [2020-09-15 01:18:37,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 01:18:37,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 01:18:37,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 01:18:37,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 01:18:37,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-15 01:18:37,198 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-15 01:18:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-15 01:18:37,198 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-15 01:18:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 01:18:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-15 01:18:37,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 01:18:37,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 01:18:37,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-15 01:18:37,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 01:18:37,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 01:18:37,203 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 01:18:37,641 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 01:18:37,642 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-15 01:18:37,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:18:37 BoogieIcfgContainer [2020-09-15 01:18:37,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 01:18:37,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 01:18:37,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 01:18:37,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 01:18:37,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:18:36" (1/3) ... [2020-09-15 01:18:37,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a0cb04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:18:37, skipping insertion in model container [2020-09-15 01:18:37,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:18:36" (2/3) ... [2020-09-15 01:18:37,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a0cb04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:18:37, skipping insertion in model container [2020-09-15 01:18:37,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:18:37" (3/3) ... [2020-09-15 01:18:37,658 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-09-15 01:18:37,670 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 01:18:37,670 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 01:18:37,681 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 01:18:37,683 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 01:18:37,712 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,713 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,713 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,713 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,714 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,714 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,715 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,715 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,715 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,716 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,716 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,716 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,717 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,717 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,717 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,717 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,718 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,718 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,718 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,719 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,719 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,719 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,720 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,720 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,720 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,721 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,725 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,726 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,727 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,735 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,735 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,735 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,736 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,736 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,736 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:18:37,762 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-15 01:18:37,789 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 01:18:37,789 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 01:18:37,790 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 01:18:37,790 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 01:18:37,790 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 01:18:37,790 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 01:18:37,790 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 01:18:37,791 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 01:18:37,809 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-15 01:18:37,812 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 01:18:37,858 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 01:18:37,859 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:18:37,866 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. [2020-09-15 01:18:37,869 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 01:18:37,887 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 01:18:37,888 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:18:37,889 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. [2020-09-15 01:18:37,891 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-15 01:18:37,893 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 01:18:38,955 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-15 01:18:39,174 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-15 01:18:39,175 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-15 01:18:39,180 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-15 01:18:39,194 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 01:18:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 01:18:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-15 01:18:39,206 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:39,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-15 01:18:39,207 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:39,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-15 01:18:39,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:39,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956723305] [2020-09-15 01:18:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:39,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956723305] [2020-09-15 01:18:39,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:39,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 01:18:39,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708932454] [2020-09-15 01:18:39,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 01:18:39,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:39,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 01:18:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-15 01:18:39,518 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-15 01:18:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:39,597 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-15 01:18:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 01:18:39,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-15 01:18:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:39,617 INFO L225 Difference]: With dead ends: 75 [2020-09-15 01:18:39,617 INFO L226 Difference]: Without dead ends: 42 [2020-09-15 01:18:39,619 INFO L675 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 [2020-09-15 01:18:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-15 01:18:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-15 01:18:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:18:39,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-15 01:18:39,672 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-15 01:18:39,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:39,672 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-15 01:18:39,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 01:18:39,672 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-15 01:18:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:18:39,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:39,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:39,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 01:18:39,674 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:39,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-15 01:18:39,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:39,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107245255] [2020-09-15 01:18:39,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:39,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107245255] [2020-09-15 01:18:39,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:39,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:18:39,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539136789] [2020-09-15 01:18:39,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:18:39,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:39,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:18:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:18:39,786 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-15 01:18:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:39,819 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-15 01:18:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-15 01:18:39,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:18:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:39,821 INFO L225 Difference]: With dead ends: 56 [2020-09-15 01:18:39,822 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 01:18:39,823 INFO L675 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 [2020-09-15 01:18:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 01:18:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 01:18:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:18:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-15 01:18:39,831 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-15 01:18:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:39,833 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-15 01:18:39,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:18:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-15 01:18:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:18:39,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:39,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:39,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 01:18:39,835 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-15 01:18:39,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:39,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114928060] [2020-09-15 01:18:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:39,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114928060] [2020-09-15 01:18:39,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:39,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:18:39,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102460360] [2020-09-15 01:18:39,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:18:39,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:39,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:18:39,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:18:39,935 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-15 01:18:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:40,026 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-15 01:18:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:18:40,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:18:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:40,028 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:18:40,028 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:18:40,029 INFO L675 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 [2020-09-15 01:18:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:18:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-15 01:18:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:18:40,041 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-15 01:18:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:40,041 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:18:40,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:18:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:18:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:18:40,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:40,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:40,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 01:18:40,043 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:40,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:40,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-15 01:18:40,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:40,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318327233] [2020-09-15 01:18:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:40,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318327233] [2020-09-15 01:18:40,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:40,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:18:40,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992093421] [2020-09-15 01:18:40,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:18:40,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:40,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:18:40,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:18:40,183 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-15 01:18:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:40,272 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-15 01:18:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:18:40,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:18:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:40,275 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:18:40,275 INFO L226 Difference]: Without dead ends: 43 [2020-09-15 01:18:40,279 INFO L675 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 [2020-09-15 01:18:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-15 01:18:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-15 01:18:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 01:18:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-15 01:18:40,290 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-15 01:18:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:40,291 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-15 01:18:40,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:18:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-15 01:18:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:18:40,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:40,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:40,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-15 01:18:40,294 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:40,295 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-15 01:18:40,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:40,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365757467] [2020-09-15 01:18:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:40,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365757467] [2020-09-15 01:18:40,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:18:40,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:18:40,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098761070] [2020-09-15 01:18:40,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:18:40,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:18:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:18:40,365 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-15 01:18:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:40,442 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-15 01:18:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:18:40,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:18:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:40,444 INFO L225 Difference]: With dead ends: 57 [2020-09-15 01:18:40,444 INFO L226 Difference]: Without dead ends: 51 [2020-09-15 01:18:40,445 INFO L675 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 [2020-09-15 01:18:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-15 01:18:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-15 01:18:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 01:18:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-15 01:18:40,451 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-15 01:18:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:40,451 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-15 01:18:40,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:18:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-15 01:18:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:40,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:40,453 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:40,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-15 01:18:40,453 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:40,454 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-15 01:18:40,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:40,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697177014] [2020-09-15 01:18:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:40,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697177014] [2020-09-15 01:18:40,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984635993] [2020-09-15 01:18:40,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:40,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:40,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:40,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:18:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:40,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:40,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:40,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:18:40,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469592159] [2020-09-15 01:18:40,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:40,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:40,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:40,716 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-15 01:18:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:40,852 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-15 01:18:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:18:40,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:18:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:40,855 INFO L225 Difference]: With dead ends: 48 [2020-09-15 01:18:40,855 INFO L226 Difference]: Without dead ends: 43 [2020-09-15 01:18:40,855 INFO L675 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 [2020-09-15 01:18:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-15 01:18:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-15 01:18:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 01:18:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-15 01:18:40,862 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-15 01:18:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:40,863 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-15 01:18:40,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-15 01:18:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:40,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:40,865 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:41,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-15 01:18:41,078 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:41,079 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-15 01:18:41,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:41,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814109853] [2020-09-15 01:18:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:41,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814109853] [2020-09-15 01:18:41,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036630055] [2020-09-15 01:18:41,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:41,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:41,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:41,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:18:41,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:41,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:41,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 01:18:41,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102590547] [2020-09-15 01:18:41,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 01:18:41,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 01:18:41,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:18:41,249 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-15 01:18:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:41,347 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-15 01:18:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:18:41,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-15 01:18:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:41,350 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:18:41,350 INFO L226 Difference]: Without dead ends: 48 [2020-09-15 01:18:41,350 INFO L675 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 [2020-09-15 01:18:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-15 01:18:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-15 01:18:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:18:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-15 01:18:41,363 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-15 01:18:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:41,363 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-15 01:18:41,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 01:18:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-15 01:18:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:41,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:41,365 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:41,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:41,581 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:41,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-15 01:18:41,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:41,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317642255] [2020-09-15 01:18:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:41,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317642255] [2020-09-15 01:18:41,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526496000] [2020-09-15 01:18:41,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:41,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:18:41,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:18:41,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:41,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:41,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:41,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:18:41,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717556631] [2020-09-15 01:18:41,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:41,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:41,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:41,757 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-15 01:18:41,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:41,900 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-15 01:18:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:18:41,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:18:41,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:41,902 INFO L225 Difference]: With dead ends: 58 [2020-09-15 01:18:41,902 INFO L226 Difference]: Without dead ends: 52 [2020-09-15 01:18:41,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-15 01:18:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-15 01:18:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-15 01:18:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-15 01:18:41,912 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-15 01:18:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:41,913 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-15 01:18:41,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-15 01:18:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:41,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:41,914 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:42,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:42,128 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:42,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:42,129 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-15 01:18:42,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:42,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804031694] [2020-09-15 01:18:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804031694] [2020-09-15 01:18:42,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182531788] [2020-09-15 01:18:42,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:42,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:18:42,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:42,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 01:18:42,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679539402] [2020-09-15 01:18:42,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 01:18:42,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:42,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 01:18:42,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:18:42,286 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-15 01:18:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:42,471 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-15 01:18:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:42,473 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-15 01:18:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:42,474 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:18:42,475 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:18:42,476 INFO L675 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 [2020-09-15 01:18:42,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:18:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-15 01:18:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-15 01:18:42,494 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-15 01:18:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:42,494 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-15 01:18:42,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 01:18:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-15 01:18:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:18:42,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:42,496 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:42,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:42,710 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:42,711 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-15 01:18:42,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:42,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121373665] [2020-09-15 01:18:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121373665] [2020-09-15 01:18:42,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496444087] [2020-09-15 01:18:42,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:42,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:42,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:42,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:42,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:42,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 01:18:42,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449177485] [2020-09-15 01:18:42,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:42,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:42,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:42,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:42,937 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-15 01:18:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:43,175 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-15 01:18:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:18:43,176 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 01:18:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:43,176 INFO L225 Difference]: With dead ends: 62 [2020-09-15 01:18:43,177 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:18:43,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:18:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:18:43,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-15 01:18:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-15 01:18:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-15 01:18:43,181 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-15 01:18:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:43,182 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-15 01:18:43,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-15 01:18:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:43,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:43,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:43,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-15 01:18:43,384 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:43,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-15 01:18:43,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:43,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887284904] [2020-09-15 01:18:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:43,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887284904] [2020-09-15 01:18:43,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97502931] [2020-09-15 01:18:43,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:43,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:18:43,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:43,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:43,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:43,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 01:18:43,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40734512] [2020-09-15 01:18:43,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:43,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:43,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:43,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:43,561 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-15 01:18:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:43,694 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-15 01:18:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:18:43,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-15 01:18:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:43,696 INFO L225 Difference]: With dead ends: 64 [2020-09-15 01:18:43,696 INFO L226 Difference]: Without dead ends: 58 [2020-09-15 01:18:43,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:18:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-15 01:18:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-15 01:18:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 01:18:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-15 01:18:43,700 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-15 01:18:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:43,701 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-15 01:18:43,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:43,701 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-15 01:18:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:43,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:43,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:43,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:43,914 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:43,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-15 01:18:43,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:43,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993880217] [2020-09-15 01:18:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:44,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993880217] [2020-09-15 01:18:44,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722393470] [2020-09-15 01:18:44,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:44,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:44,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:44,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:44,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:44,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:44,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:44,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:18:44,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349102046] [2020-09-15 01:18:44,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:44,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:44,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:44,102 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-15 01:18:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:44,332 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-15 01:18:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:18:44,332 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:18:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:44,333 INFO L225 Difference]: With dead ends: 61 [2020-09-15 01:18:44,334 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:18:44,334 INFO L675 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 [2020-09-15 01:18:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:18:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-15 01:18:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-15 01:18:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-15 01:18:44,339 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-15 01:18:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:44,339 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-15 01:18:44,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:44,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-15 01:18:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:44,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:44,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:44,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:44,551 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-15 01:18:44,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:44,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398855745] [2020-09-15 01:18:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:44,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398855745] [2020-09-15 01:18:44,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166809201] [2020-09-15 01:18:44,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:44,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:44,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:44,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:44,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:44,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 01:18:44,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499607683] [2020-09-15 01:18:44,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 01:18:44,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:44,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 01:18:44,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 01:18:44,709 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-15 01:18:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:44,867 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-15 01:18:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:44,868 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-15 01:18:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:44,869 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:18:44,869 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:18:44,869 INFO L675 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 [2020-09-15 01:18:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:18:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-15 01:18:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 01:18:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-15 01:18:44,874 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-15 01:18:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:44,875 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-15 01:18:44,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 01:18:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-15 01:18:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:44,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:44,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:45,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-15 01:18:45,087 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:45,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-15 01:18:45,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:45,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889501775] [2020-09-15 01:18:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889501775] [2020-09-15 01:18:45,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433143496] [2020-09-15 01:18:45,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:45,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:18:45,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:45,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:45,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:45,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:18:45,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344187124] [2020-09-15 01:18:45,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:45,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:45,280 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-15 01:18:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:45,501 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-09-15 01:18:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:18:45,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:18:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:45,502 INFO L225 Difference]: With dead ends: 56 [2020-09-15 01:18:45,502 INFO L226 Difference]: Without dead ends: 48 [2020-09-15 01:18:45,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:18:45,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-15 01:18:45,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-09-15 01:18:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-15 01:18:45,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-15 01:18:45,506 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-15 01:18:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:45,506 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-15 01:18:45,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-15 01:18:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:18:45,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:45,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:45,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:45,718 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-15 01:18:45,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:45,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396538988] [2020-09-15 01:18:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396538988] [2020-09-15 01:18:45,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097165593] [2020-09-15 01:18:45,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:18:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:45,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:45,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:45,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-15 01:18:45,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632781616] [2020-09-15 01:18:45,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:45,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:45,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:45,920 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-15 01:18:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:46,154 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-15 01:18:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:46,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 01:18:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:46,155 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:18:46,155 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:18:46,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:18:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:18:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-15 01:18:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:18:46,159 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-15 01:18:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:46,159 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:18:46,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:18:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:46,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:46,160 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:46,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 01:18:46,361 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:46,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-15 01:18:46,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:46,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950196437] [2020-09-15 01:18:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:46,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950196437] [2020-09-15 01:18:46,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331175140] [2020-09-15 01:18:46,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:46,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:46,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:46,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:46,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:46,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:46,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:18:46,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562041151] [2020-09-15 01:18:46,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:46,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:46,529 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-15 01:18:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:46,783 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-15 01:18:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:46,784 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:18:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:46,784 INFO L225 Difference]: With dead ends: 54 [2020-09-15 01:18:46,785 INFO L226 Difference]: Without dead ends: 49 [2020-09-15 01:18:46,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:46,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-15 01:18:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-15 01:18:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 01:18:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-15 01:18:46,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-15 01:18:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:46,789 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-15 01:18:46,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-15 01:18:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:46,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:46,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:47,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 01:18:47,001 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-15 01:18:47,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:47,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372999848] [2020-09-15 01:18:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:47,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372999848] [2020-09-15 01:18:47,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713871753] [2020-09-15 01:18:47,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:47,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:18:47,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:47,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:47,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:47,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:47,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:18:47,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891595581] [2020-09-15 01:18:47,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:47,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:47,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:47,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:47,179 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-15 01:18:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:47,306 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-15 01:18:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:18:47,307 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:18:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:47,308 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:18:47,309 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:18:47,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:18:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:18:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-15 01:18:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-15 01:18:47,314 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-15 01:18:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:47,314 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-15 01:18:47,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-15 01:18:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:47,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:47,315 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:47,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-15 01:18:47,524 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:47,525 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-15 01:18:47,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:47,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693016028] [2020-09-15 01:18:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:47,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693016028] [2020-09-15 01:18:47,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894895200] [2020-09-15 01:18:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:47,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:47,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:47,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:47,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:18:47,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917545798] [2020-09-15 01:18:47,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:47,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:47,811 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-15 01:18:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:47,955 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-15 01:18:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:18:47,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:18:47,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:47,957 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:18:47,957 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:18:47,958 INFO L675 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 [2020-09-15 01:18:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:18:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-15 01:18:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-15 01:18:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-15 01:18:47,962 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-15 01:18:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:47,962 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-15 01:18:47,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:47,962 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-15 01:18:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:47,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:47,965 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:48,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 01:18:48,175 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-15 01:18:48,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:48,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49790921] [2020-09-15 01:18:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:48,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49790921] [2020-09-15 01:18:48,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205990700] [2020-09-15 01:18:48,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:48,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:18:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:48,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:48,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:48,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:18:48,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036031134] [2020-09-15 01:18:48,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:48,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:48,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:48,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:48,335 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-15 01:18:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:48,491 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-15 01:18:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:18:48,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:18:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:48,493 INFO L225 Difference]: With dead ends: 67 [2020-09-15 01:18:48,493 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:18:48,493 INFO L675 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 [2020-09-15 01:18:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:18:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-15 01:18:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-15 01:18:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-15 01:18:48,496 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-15 01:18:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:48,497 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-15 01:18:48,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-15 01:18:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:48,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:48,498 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:48,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:48,708 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-15 01:18:48,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:48,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653955439] [2020-09-15 01:18:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:48,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653955439] [2020-09-15 01:18:48,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225812811] [2020-09-15 01:18:48,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:48,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:18:48,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:48,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:48,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:48,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:48,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:48,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:18:48,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555550262] [2020-09-15 01:18:48,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:48,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:48,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:48,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:48,896 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-15 01:18:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:49,154 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-15 01:18:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:49,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:18:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:49,157 INFO L225 Difference]: With dead ends: 69 [2020-09-15 01:18:49,157 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 01:18:49,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 01:18:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-15 01:18:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:18:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-15 01:18:49,161 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-15 01:18:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:49,161 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-15 01:18:49,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-15 01:18:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:49,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:49,162 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:49,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:49,363 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:49,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-15 01:18:49,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:49,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993099736] [2020-09-15 01:18:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:49,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993099736] [2020-09-15 01:18:49,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933971174] [2020-09-15 01:18:49,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:49,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:49,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:49,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:49,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 01:18:49,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005928254] [2020-09-15 01:18:49,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:18:49,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:49,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:18:49,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:18:49,528 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-15 01:18:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:49,795 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:18:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:49,799 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-15 01:18:49,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:49,800 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:18:49,800 INFO L226 Difference]: Without dead ends: 82 [2020-09-15 01:18:49,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:18:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-15 01:18:49,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-15 01:18:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:18:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-15 01:18:49,804 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-15 01:18:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:49,804 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-15 01:18:49,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:18:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-15 01:18:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:18:49,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:49,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:50,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:50,014 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-15 01:18:50,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:50,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112352506] [2020-09-15 01:18:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:50,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112352506] [2020-09-15 01:18:50,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053488805] [2020-09-15 01:18:50,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:50,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:50,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:50,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:18:50,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:50,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:50,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:50,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-15 01:18:50,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579021596] [2020-09-15 01:18:50,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:50,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:50,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:50,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:50,188 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-15 01:18:50,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:50,494 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-15 01:18:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:50,495 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 01:18:50,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:50,496 INFO L225 Difference]: With dead ends: 69 [2020-09-15 01:18:50,496 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:18:50,497 INFO L675 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 [2020-09-15 01:18:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:18:50,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-15 01:18:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 01:18:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-15 01:18:50,500 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-15 01:18:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:50,500 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-15 01:18:50,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-15 01:18:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:50,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:50,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-15 01:18:50,706 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:50,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-15 01:18:50,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:50,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359886715] [2020-09-15 01:18:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:50,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359886715] [2020-09-15 01:18:50,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928529315] [2020-09-15 01:18:50,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:50,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:18:50,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:50,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:50,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:18:50,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391755171] [2020-09-15 01:18:50,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:50,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:50,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:50,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:50,916 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-15 01:18:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:51,083 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-15 01:18:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:51,084 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:18:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:51,085 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:18:51,085 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:18:51,085 INFO L675 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 [2020-09-15 01:18:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:18:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-15 01:18:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:18:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:18:51,088 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-15 01:18:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:51,088 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:18:51,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:18:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:51,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:51,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:51,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-15 01:18:51,292 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:51,293 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-15 01:18:51,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:51,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052739605] [2020-09-15 01:18:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:51,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052739605] [2020-09-15 01:18:51,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164381886] [2020-09-15 01:18:51,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:51,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:51,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:51,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:51,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:51,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:51,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:18:51,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198695870] [2020-09-15 01:18:51,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:51,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:51,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:51,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:51,498 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-15 01:18:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:51,752 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-15 01:18:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:51,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:18:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:51,754 INFO L225 Difference]: With dead ends: 71 [2020-09-15 01:18:51,754 INFO L226 Difference]: Without dead ends: 65 [2020-09-15 01:18:51,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:18:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-15 01:18:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-15 01:18:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:18:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:18:51,758 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-15 01:18:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:51,758 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:18:51,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:18:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:51,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:51,759 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:51,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 01:18:51,967 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:51,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-15 01:18:51,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:51,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447574701] [2020-09-15 01:18:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:52,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447574701] [2020-09-15 01:18:52,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227835824] [2020-09-15 01:18:52,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:52,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:18:52,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:52,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:52,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:52,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:52,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:18:52,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457113214] [2020-09-15 01:18:52,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:52,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:52,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:52,160 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-15 01:18:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:52,385 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-15 01:18:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:18:52,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:18:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:52,386 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:18:52,386 INFO L226 Difference]: Without dead ends: 62 [2020-09-15 01:18:52,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:52,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-15 01:18:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-15 01:18:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:18:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:18:52,389 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-15 01:18:52,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:52,389 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:18:52,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:18:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:52,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:52,390 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:52,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-15 01:18:52,598 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:52,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-15 01:18:52,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:52,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380849594] [2020-09-15 01:18:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:52,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380849594] [2020-09-15 01:18:52,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186060856] [2020-09-15 01:18:52,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:52,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:18:52,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:52,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:52,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:52,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:52,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:18:52,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993211856] [2020-09-15 01:18:52,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:52,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:52,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:52,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:52,794 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-15 01:18:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:53,124 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-15 01:18:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:53,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:18:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:53,128 INFO L225 Difference]: With dead ends: 67 [2020-09-15 01:18:53,128 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:18:53,129 INFO L675 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 [2020-09-15 01:18:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:18:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-15 01:18:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:18:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:18:53,131 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-15 01:18:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:53,132 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:18:53,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:18:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:53,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:53,132 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:53,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 01:18:53,333 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-15 01:18:53,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:53,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130847575] [2020-09-15 01:18:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:53,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130847575] [2020-09-15 01:18:53,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040159200] [2020-09-15 01:18:53,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:53,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:53,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:53,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 01:18:53,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186372357] [2020-09-15 01:18:53,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:18:53,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:53,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:18:53,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:18:53,499 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-15 01:18:53,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:53,784 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-15 01:18:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:53,784 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-15 01:18:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:53,785 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:18:53,786 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:18:53,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:18:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:18:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-15 01:18:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:18:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-15 01:18:53,790 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-15 01:18:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:53,790 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-15 01:18:53,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:18:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-15 01:18:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:53,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:53,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:53,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:53,999 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-15 01:18:54,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:54,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357043619] [2020-09-15 01:18:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:54,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357043619] [2020-09-15 01:18:54,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337739536] [2020-09-15 01:18:54,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:54,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:54,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:54,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:54,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:54,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:54,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:18:54,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388166392] [2020-09-15 01:18:54,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:54,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:54,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:54,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:54,185 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-15 01:18:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:54,513 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-15 01:18:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:54,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:18:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:54,514 INFO L225 Difference]: With dead ends: 62 [2020-09-15 01:18:54,514 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:18:54,515 INFO L675 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 [2020-09-15 01:18:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:18:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-15 01:18:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-15 01:18:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-15 01:18:54,518 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-15 01:18:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:54,518 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-15 01:18:54,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-15 01:18:54,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:18:54,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:54,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:54,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 01:18:54,727 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-15 01:18:54,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:54,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324913179] [2020-09-15 01:18:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:54,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324913179] [2020-09-15 01:18:54,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738063372] [2020-09-15 01:18:54,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:54,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:18:54,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:54,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:18:54,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:54,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:54,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:54,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:18:54,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154381654] [2020-09-15 01:18:54,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:54,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:54,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:54,902 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-15 01:18:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:55,201 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-15 01:18:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:55,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:18:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:55,202 INFO L225 Difference]: With dead ends: 68 [2020-09-15 01:18:55,202 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 01:18:55,203 INFO L675 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 [2020-09-15 01:18:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 01:18:55,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-15 01:18:55,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:18:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-15 01:18:55,206 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-15 01:18:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:55,206 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-15 01:18:55,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-15 01:18:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:55,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:55,207 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:55,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-15 01:18:55,411 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-15 01:18:55,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:55,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725166672] [2020-09-15 01:18:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:55,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725166672] [2020-09-15 01:18:55,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022476663] [2020-09-15 01:18:55,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:55,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:55,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:55,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:55,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:18:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:55,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:55,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:18:55,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611441619] [2020-09-15 01:18:55,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:55,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:55,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:55,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:55,603 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-15 01:18:55,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:55,983 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-15 01:18:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:55,984 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:18:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:55,985 INFO L225 Difference]: With dead ends: 60 [2020-09-15 01:18:55,985 INFO L226 Difference]: Without dead ends: 55 [2020-09-15 01:18:55,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:18:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-15 01:18:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-15 01:18:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 01:18:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-15 01:18:55,988 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-15 01:18:55,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:55,988 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-15 01:18:55,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-15 01:18:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:55,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:55,989 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:56,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:56,191 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-15 01:18:56,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:56,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524159377] [2020-09-15 01:18:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:56,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524159377] [2020-09-15 01:18:56,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055427162] [2020-09-15 01:18:56,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:56,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:18:56,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:56,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:56,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:56,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:56,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:18:56,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13613033] [2020-09-15 01:18:56,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:56,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:56,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:56,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:56,414 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-15 01:18:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:56,589 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-15 01:18:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:18:56,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:18:56,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:56,591 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:18:56,591 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 01:18:56,592 INFO L675 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 [2020-09-15 01:18:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 01:18:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-15 01:18:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:18:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-15 01:18:56,595 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-15 01:18:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:56,596 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-15 01:18:56,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-15 01:18:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:56,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:56,597 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:56,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:56,807 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:56,808 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-15 01:18:56,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:56,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535794746] [2020-09-15 01:18:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:56,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535794746] [2020-09-15 01:18:56,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113680900] [2020-09-15 01:18:56,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:56,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:18:56,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:56,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:56,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:57,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:57,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:57,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:18:57,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991607035] [2020-09-15 01:18:57,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:57,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:57,022 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-15 01:18:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:57,223 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-15 01:18:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:18:57,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:18:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:57,224 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:18:57,225 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:18:57,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:18:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:18:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-15 01:18:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 01:18:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-15 01:18:57,228 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-15 01:18:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:57,229 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-15 01:18:57,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-15 01:18:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:57,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:57,231 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:57,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 01:18:57,446 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:57,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-15 01:18:57,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:57,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005045764] [2020-09-15 01:18:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:57,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005045764] [2020-09-15 01:18:57,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004344223] [2020-09-15 01:18:57,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:57,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:57,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:18:57,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773228256] [2020-09-15 01:18:57,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:57,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:57,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:57,644 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-15 01:18:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:57,917 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-15 01:18:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:18:57,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:18:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:57,919 INFO L225 Difference]: With dead ends: 75 [2020-09-15 01:18:57,919 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 01:18:57,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:18:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 01:18:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-15 01:18:57,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 01:18:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-15 01:18:57,922 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-15 01:18:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:57,922 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-15 01:18:57,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-15 01:18:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:57,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:57,923 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:58,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:58,133 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-15 01:18:58,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:58,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833952356] [2020-09-15 01:18:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:58,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833952356] [2020-09-15 01:18:58,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552778462] [2020-09-15 01:18:58,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:58,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:58,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:58,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:58,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:58,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:58,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:18:58,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471354843] [2020-09-15 01:18:58,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:58,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:58,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:58,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:58,315 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-15 01:18:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:58,643 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-15 01:18:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:18:58,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:18:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:58,645 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:18:58,645 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:18:58,645 INFO L675 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 [2020-09-15 01:18:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:18:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-15 01:18:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:18:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-15 01:18:58,648 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-15 01:18:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:58,648 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-15 01:18:58,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:18:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-15 01:18:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:58,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:58,650 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:58,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-15 01:18:58,857 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-15 01:18:58,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:58,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607299886] [2020-09-15 01:18:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:58,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607299886] [2020-09-15 01:18:58,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021882163] [2020-09-15 01:18:58,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:59,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:18:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:59,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:59,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:59,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:18:59,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713927290] [2020-09-15 01:18:59,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:18:59,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:59,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:18:59,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:18:59,101 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-15 01:18:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:59,397 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-15 01:18:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:18:59,398 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:18:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:59,399 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:18:59,399 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:18:59,400 INFO L675 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 [2020-09-15 01:18:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:18:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-15 01:18:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 01:18:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-15 01:18:59,404 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-15 01:18:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:59,405 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-15 01:18:59,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:18:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-15 01:18:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:59,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:59,406 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:59,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:59,606 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-15 01:18:59,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:59,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956376097] [2020-09-15 01:18:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:59,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956376097] [2020-09-15 01:18:59,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668736581] [2020-09-15 01:18:59,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:18:59,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:59,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:18:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:59,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:18:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:59,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:59,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:18:59,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032965527] [2020-09-15 01:18:59,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:18:59,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:59,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:18:59,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:18:59,857 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-15 01:19:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:00,359 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-15 01:19:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:19:00,360 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:19:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:00,361 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:19:00,361 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 01:19:00,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:19:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 01:19:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-15 01:19:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:19:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-15 01:19:00,366 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-15 01:19:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:00,366 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-15 01:19:00,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:19:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-15 01:19:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:19:00,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:00,367 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:00,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-15 01:19:00,578 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:00,579 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-15 01:19:00,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:00,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658551679] [2020-09-15 01:19:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:00,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658551679] [2020-09-15 01:19:00,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490972778] [2020-09-15 01:19:00,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:00,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:19:00,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:00,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:19:00,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:00,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:00,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 01:19:00,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968121966] [2020-09-15 01:19:00,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:19:00,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:00,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:19:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:19:00,818 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-15 01:19:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:01,142 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-15 01:19:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:01,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-15 01:19:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:01,143 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:19:01,143 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:19:01,144 INFO L675 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 [2020-09-15 01:19:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:19:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-15 01:19:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:19:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-15 01:19:01,147 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-15 01:19:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:01,147 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-15 01:19:01,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:19:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-15 01:19:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:19:01,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:01,148 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:01,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-15 01:19:01,357 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-15 01:19:01,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:01,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818417793] [2020-09-15 01:19:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:01,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818417793] [2020-09-15 01:19:01,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16164582] [2020-09-15 01:19:01,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:01,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:19:01,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:01,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:19:01,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:01,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:01,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:01,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-15 01:19:01,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965700233] [2020-09-15 01:19:01,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:19:01,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:19:01,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:19:01,559 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-15 01:19:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:01,983 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-15 01:19:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:01,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 01:19:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:01,984 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:19:01,984 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 01:19:01,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:19:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 01:19:01,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-15 01:19:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:19:01,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-15 01:19:01,988 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-15 01:19:01,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:01,988 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-15 01:19:01,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:19:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-15 01:19:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:01,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:01,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:02,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-15 01:19:02,200 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:02,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:02,201 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-15 01:19:02,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:02,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146741335] [2020-09-15 01:19:02,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:02,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146741335] [2020-09-15 01:19:02,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310952177] [2020-09-15 01:19:02,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:02,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:02,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:02,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:02,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:19:02,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727257997] [2020-09-15 01:19:02,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:19:02,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:02,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:19:02,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:19:02,514 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-15 01:19:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:02,775 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-15 01:19:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:19:02,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:19:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:02,777 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:19:02,777 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:19:02,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:19:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:19:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-15 01:19:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:19:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:19:02,782 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:19:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:02,782 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:19:02,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:19:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:19:02,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:02,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:02,784 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:02,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 01:19:02,994 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:02,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-15 01:19:02,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:02,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057126295] [2020-09-15 01:19:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:03,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057126295] [2020-09-15 01:19:03,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694175425] [2020-09-15 01:19:03,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:03,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:03,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:03,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:03,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:03,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:03,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:03,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:19:03,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358428049] [2020-09-15 01:19:03,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:03,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:03,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:03,274 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:19:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:03,523 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-15 01:19:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:19:03,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:19:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:03,527 INFO L225 Difference]: With dead ends: 81 [2020-09-15 01:19:03,527 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 01:19:03,528 INFO L675 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 [2020-09-15 01:19:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 01:19:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-15 01:19:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:19:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:19:03,532 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:19:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:03,533 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:19:03,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:19:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:03,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:03,533 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:03,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-15 01:19:03,742 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:03,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:03,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-15 01:19:03,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:03,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323012078] [2020-09-15 01:19:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:03,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323012078] [2020-09-15 01:19:03,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803668722] [2020-09-15 01:19:03,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:03,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:19:03,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:03,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:03,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:03,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:03,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:19:03,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799106753] [2020-09-15 01:19:03,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:19:03,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:03,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:19:03,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:19:03,933 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:19:04,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:04,205 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-15 01:19:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:19:04,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:19:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:04,206 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:19:04,207 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:19:04,207 INFO L675 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 [2020-09-15 01:19:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:19:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-15 01:19:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:19:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:19:04,210 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:19:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:04,210 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:19:04,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:19:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:19:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:04,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:04,211 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:04,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-15 01:19:04,419 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:04,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-15 01:19:04,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:04,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556009941] [2020-09-15 01:19:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:04,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556009941] [2020-09-15 01:19:04,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617796952] [2020-09-15 01:19:04,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:04,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:04,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:04,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:04,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:04,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:04,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:04,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:19:04,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886583567] [2020-09-15 01:19:04,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:04,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:04,634 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:19:05,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:05,031 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-15 01:19:05,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:19:05,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:19:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:05,033 INFO L225 Difference]: With dead ends: 77 [2020-09-15 01:19:05,034 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:19:05,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:19:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:19:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-15 01:19:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:19:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:19:05,037 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:19:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:05,038 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:19:05,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:19:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:05,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:05,039 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:05,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-15 01:19:05,248 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:05,249 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-15 01:19:05,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:05,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459815315] [2020-09-15 01:19:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:05,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459815315] [2020-09-15 01:19:05,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746702799] [2020-09-15 01:19:05,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:05,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:19:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:05,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:05,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:05,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:19:05,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183329164] [2020-09-15 01:19:05,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:19:05,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:05,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:19:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:19:05,434 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:19:05,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:05,758 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-15 01:19:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:05,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:19:05,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:05,759 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:19:05,760 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 01:19:05,760 INFO L675 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 [2020-09-15 01:19:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 01:19:05,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-15 01:19:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:19:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:19:05,763 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-15 01:19:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:05,763 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:19:05,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:19:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:19:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:05,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:05,764 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:05,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:05,972 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-15 01:19:05,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:05,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380193840] [2020-09-15 01:19:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:06,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380193840] [2020-09-15 01:19:06,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199603294] [2020-09-15 01:19:06,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:06,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:19:06,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:06,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:06,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:06,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:19:06,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300094602] [2020-09-15 01:19:06,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:06,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:06,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:06,188 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-15 01:19:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:06,658 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-15 01:19:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:06,658 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:19:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:06,659 INFO L225 Difference]: With dead ends: 73 [2020-09-15 01:19:06,659 INFO L226 Difference]: Without dead ends: 67 [2020-09-15 01:19:06,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:19:06,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-15 01:19:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-15 01:19:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:19:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:19:06,662 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-15 01:19:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:06,662 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:19:06,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:19:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:06,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:06,663 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:06,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-15 01:19:06,870 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-15 01:19:06,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:06,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541732708] [2020-09-15 01:19:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:06,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541732708] [2020-09-15 01:19:06,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603382915] [2020-09-15 01:19:06,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:07,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:07,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:07,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:07,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 01:19:07,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254610899] [2020-09-15 01:19:07,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:19:07,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:07,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:19:07,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:19:07,069 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-15 01:19:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:07,445 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-15 01:19:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:07,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-15 01:19:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:07,447 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:19:07,447 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:19:07,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:19:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:19:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-15 01:19:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:19:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-15 01:19:07,451 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-15 01:19:07,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:07,452 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-15 01:19:07,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:19:07,452 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-15 01:19:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:07,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:07,453 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:07,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:07,662 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:07,662 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-15 01:19:07,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:07,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643655060] [2020-09-15 01:19:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:07,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643655060] [2020-09-15 01:19:07,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356233751] [2020-09-15 01:19:07,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:07,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:07,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:07,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:07,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:07,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:19:07,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395798186] [2020-09-15 01:19:07,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:07,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:07,860 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-15 01:19:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:08,351 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-15 01:19:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:08,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:19:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:08,352 INFO L225 Difference]: With dead ends: 70 [2020-09-15 01:19:08,352 INFO L226 Difference]: Without dead ends: 62 [2020-09-15 01:19:08,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:19:08,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-15 01:19:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-15 01:19:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 01:19:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-15 01:19:08,356 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-15 01:19:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:08,356 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-15 01:19:08,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:08,356 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-15 01:19:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 01:19:08,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:08,357 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:08,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-15 01:19:08,566 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-15 01:19:08,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:08,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071593589] [2020-09-15 01:19:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:08,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071593589] [2020-09-15 01:19:08,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840910015] [2020-09-15 01:19:08,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:08,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:19:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:19:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:08,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:08,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:08,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 01:19:08,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409888348] [2020-09-15 01:19:08,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:08,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:08,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:08,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:08,770 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-15 01:19:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:09,216 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-15 01:19:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:09,217 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 01:19:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:09,218 INFO L225 Difference]: With dead ends: 76 [2020-09-15 01:19:09,218 INFO L226 Difference]: Without dead ends: 71 [2020-09-15 01:19:09,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:19:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-15 01:19:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-15 01:19:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:19:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-15 01:19:09,222 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-15 01:19:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:09,222 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-15 01:19:09,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-15 01:19:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:09,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:09,223 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:09,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:09,431 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:09,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:09,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-15 01:19:09,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:09,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500936583] [2020-09-15 01:19:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:09,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500936583] [2020-09-15 01:19:09,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021234676] [2020-09-15 01:19:09,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:09,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:09,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:09,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:09,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:09,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:09,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:09,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:09,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816910887] [2020-09-15 01:19:09,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:09,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:09,637 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-15 01:19:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:10,122 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-15 01:19:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:10,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:10,123 INFO L225 Difference]: With dead ends: 66 [2020-09-15 01:19:10,124 INFO L226 Difference]: Without dead ends: 61 [2020-09-15 01:19:10,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:19:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-15 01:19:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-15 01:19:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 01:19:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 01:19:10,127 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-15 01:19:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:10,127 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 01:19:10,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 01:19:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:10,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:10,128 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:10,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-15 01:19:10,337 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-15 01:19:10,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:10,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601464574] [2020-09-15 01:19:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:10,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601464574] [2020-09-15 01:19:10,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115303741] [2020-09-15 01:19:10,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:10,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:19:10,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:10,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:10,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:10,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314561294] [2020-09-15 01:19:10,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:10,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:10,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:10,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:10,547 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-15 01:19:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:10,742 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-15 01:19:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:19:10,743 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:10,744 INFO L225 Difference]: With dead ends: 72 [2020-09-15 01:19:10,744 INFO L226 Difference]: Without dead ends: 66 [2020-09-15 01:19:10,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:19:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-15 01:19:10,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-15 01:19:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:19:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-15 01:19:10,748 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-15 01:19:10,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:10,748 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-15 01:19:10,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-15 01:19:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:10,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:10,749 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:10,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-15 01:19:10,950 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:10,951 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-15 01:19:10,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:10,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66425924] [2020-09-15 01:19:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:11,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66425924] [2020-09-15 01:19:11,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257058637] [2020-09-15 01:19:11,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:11,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:19:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:11,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:11,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:11,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:11,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112997726] [2020-09-15 01:19:11,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:11,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:11,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:11,215 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-15 01:19:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:11,475 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-15 01:19:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:19:11,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:11,477 INFO L225 Difference]: With dead ends: 82 [2020-09-15 01:19:11,477 INFO L226 Difference]: Without dead ends: 76 [2020-09-15 01:19:11,478 INFO L675 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 [2020-09-15 01:19:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-15 01:19:11,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-15 01:19:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 01:19:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-15 01:19:11,481 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-15 01:19:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:11,482 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-15 01:19:11,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-15 01:19:11,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:11,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:11,483 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:11,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-15 01:19:11,709 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:11,710 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-15 01:19:11,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:11,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855475568] [2020-09-15 01:19:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:11,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855475568] [2020-09-15 01:19:11,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136806984] [2020-09-15 01:19:11,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:11,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:11,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:11,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:11,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:11,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961228936] [2020-09-15 01:19:11,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:11,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:11,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:11,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:11,918 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-15 01:19:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:12,228 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-15 01:19:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:12,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:12,230 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:19:12,230 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:19:12,231 INFO L675 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 [2020-09-15 01:19:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:19:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-15 01:19:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:19:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-15 01:19:12,233 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-15 01:19:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:12,234 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-15 01:19:12,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-15 01:19:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:12,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:12,235 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:12,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-15 01:19:12,444 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-15 01:19:12,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:12,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22883346] [2020-09-15 01:19:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:12,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22883346] [2020-09-15 01:19:12,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306569008] [2020-09-15 01:19:12,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:12,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:12,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:12,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:12,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:12,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:12,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:12,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:12,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815222713] [2020-09-15 01:19:12,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:12,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:12,687 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-15 01:19:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:13,060 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-15 01:19:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:19:13,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:13,066 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:19:13,066 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:19:13,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:19:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:19:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-15 01:19:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:19:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-15 01:19:13,069 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-15 01:19:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:13,069 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-15 01:19:13,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-15 01:19:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:13,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:13,070 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:13,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:13,271 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-15 01:19:13,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:13,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297010899] [2020-09-15 01:19:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:13,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297010899] [2020-09-15 01:19:13,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332083328] [2020-09-15 01:19:13,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:13,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:19:13,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:13,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:13,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:13,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:13,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647681030] [2020-09-15 01:19:13,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:13,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:13,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:13,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:13,553 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-15 01:19:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:13,957 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-15 01:19:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:13,958 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:13,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:13,959 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:19:13,960 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:19:13,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:19:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:19:13,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-15 01:19:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:19:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-15 01:19:13,964 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-15 01:19:13,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:13,964 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-15 01:19:13,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:13,965 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-15 01:19:13,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:13,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:13,965 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:14,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:14,176 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-15 01:19:14,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:14,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110037687] [2020-09-15 01:19:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:14,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110037687] [2020-09-15 01:19:14,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438436267] [2020-09-15 01:19:14,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:14,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:14,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:14,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:14,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:14,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:14,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:14,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:14,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051917028] [2020-09-15 01:19:14,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:14,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:14,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:14,390 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-15 01:19:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:14,853 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-15 01:19:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:14,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:14,854 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:19:14,855 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:19:14,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:19:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:19:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-15 01:19:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:19:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-15 01:19:14,858 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-15 01:19:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:14,858 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-15 01:19:14,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-15 01:19:14,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:14,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:14,859 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:15,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-15 01:19:15,066 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:15,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:15,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-15 01:19:15,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:15,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626296455] [2020-09-15 01:19:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:15,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626296455] [2020-09-15 01:19:15,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454057453] [2020-09-15 01:19:15,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:15,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:19:15,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:15,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:15,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:15,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:15,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688122445] [2020-09-15 01:19:15,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:15,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:15,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:15,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:15,257 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-15 01:19:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:15,654 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-15 01:19:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:19:15,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:15,656 INFO L225 Difference]: With dead ends: 87 [2020-09-15 01:19:15,656 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 01:19:15,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:19:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 01:19:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-15 01:19:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-15 01:19:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-15 01:19:15,660 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-15 01:19:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:15,660 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-15 01:19:15,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-15 01:19:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:15,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:15,661 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:15,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:15,861 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-15 01:19:15,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:15,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134537618] [2020-09-15 01:19:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:15,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134537618] [2020-09-15 01:19:15,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658797715] [2020-09-15 01:19:15,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:16,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:19:16,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:16,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:16,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:16,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:16,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:16,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080663646] [2020-09-15 01:19:16,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:16,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:16,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:16,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:16,103 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-15 01:19:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:16,647 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-15 01:19:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:16,648 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:16,649 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:19:16,649 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:19:16,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:19:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:19:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-15 01:19:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:19:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-15 01:19:16,653 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-15 01:19:16,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:16,654 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-15 01:19:16,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-15 01:19:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:16,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:16,655 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:16,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-15 01:19:16,865 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:16,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-15 01:19:16,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:16,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755817490] [2020-09-15 01:19:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:16,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755817490] [2020-09-15 01:19:16,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771338645] [2020-09-15 01:19:16,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:17,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:17,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:17,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:17,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 01:19:17,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875065396] [2020-09-15 01:19:17,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:19:17,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:17,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:19:17,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:19:17,057 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-15 01:19:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:17,503 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-15 01:19:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:17,504 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-15 01:19:17,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:17,505 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:19:17,505 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:19:17,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:19:17,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-15 01:19:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:19:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-15 01:19:17,508 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-15 01:19:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:17,508 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-15 01:19:17,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:19:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-15 01:19:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 01:19:17,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:17,509 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:17,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-15 01:19:17,717 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:17,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-15 01:19:17,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:17,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492216650] [2020-09-15 01:19:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:17,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492216650] [2020-09-15 01:19:17,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473782304] [2020-09-15 01:19:17,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:17,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:17,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:19:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:17,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:17,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:17,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 01:19:17,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276885966] [2020-09-15 01:19:17,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:17,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:17,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:17,917 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-15 01:19:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:18,467 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-15 01:19:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:18,468 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 01:19:18,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:18,469 INFO L225 Difference]: With dead ends: 85 [2020-09-15 01:19:18,469 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:19:18,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:19:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:19:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-15 01:19:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:19:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-15 01:19:18,473 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-15 01:19:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:18,473 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-15 01:19:18,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-15 01:19:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:18,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:18,474 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:18,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-15 01:19:18,675 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-15 01:19:18,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:18,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852484560] [2020-09-15 01:19:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:18,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852484560] [2020-09-15 01:19:18,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999436045] [2020-09-15 01:19:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:18,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:19:18,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:18,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:18,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:18,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763568250] [2020-09-15 01:19:18,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:18,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:18,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:18,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:18,913 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-15 01:19:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:19,193 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-15 01:19:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:19:19,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:19,195 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:19:19,195 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:19:19,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:19:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:19:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-15 01:19:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:19,199 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:19:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:19,200 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:19,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:19,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:19,200 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:19,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-15 01:19:19,410 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:19,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:19,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-15 01:19:19,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:19,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688102603] [2020-09-15 01:19:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:19,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688102603] [2020-09-15 01:19:19,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635791574] [2020-09-15 01:19:19,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:19,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:19,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:19,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:19,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:19,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:19,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:19,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:19,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918833824] [2020-09-15 01:19:19,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:19,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:19,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:19,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:19,655 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:19:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:20,028 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-15 01:19:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:19:20,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:20,029 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:19:20,029 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:19:20,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:19:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:19:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-15 01:19:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:20,031 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:19:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:20,032 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:20,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:20,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:20,032 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:20,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-15 01:19:20,233 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:20,234 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-15 01:19:20,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:20,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144035695] [2020-09-15 01:19:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:20,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144035695] [2020-09-15 01:19:20,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833962621] [2020-09-15 01:19:20,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:20,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:19:20,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:20,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:20,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:20,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:20,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:20,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601854134] [2020-09-15 01:19:20,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:20,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:20,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:20,462 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:19:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:20,802 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:19:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:20,803 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:20,804 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:19:20,804 INFO L226 Difference]: Without dead ends: 82 [2020-09-15 01:19:20,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:19:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-15 01:19:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-15 01:19:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:20,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:20,808 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:19:20,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:20,808 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:20,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:20,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:20,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:20,809 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:21,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:21,018 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:21,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-15 01:19:21,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:21,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239487850] [2020-09-15 01:19:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:21,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239487850] [2020-09-15 01:19:21,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057315706] [2020-09-15 01:19:21,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:21,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:19:21,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:21,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:21,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:21,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:21,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:21,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847719494] [2020-09-15 01:19:21,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:21,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:21,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:21,252 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:19:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:21,664 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-15 01:19:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:21,665 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:21,666 INFO L225 Difference]: With dead ends: 87 [2020-09-15 01:19:21,666 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 01:19:21,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:19:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 01:19:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-15 01:19:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:21,670 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:19:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:21,670 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:21,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:21,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:21,671 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:21,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:21,880 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-15 01:19:21,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:21,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062329648] [2020-09-15 01:19:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:22,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062329648] [2020-09-15 01:19:22,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039017897] [2020-09-15 01:19:22,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:22,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:22,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:22,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:22,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:22,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275074748] [2020-09-15 01:19:22,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:22,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:22,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:22,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:22,098 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:19:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:22,503 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-15 01:19:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:22,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:22,505 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:19:22,505 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:19:22,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:19:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:19:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-15 01:19:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:22,507 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:19:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:22,508 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:22,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:22,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:22,508 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:22,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-15 01:19:22,711 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:22,712 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-15 01:19:22,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:22,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669934188] [2020-09-15 01:19:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:22,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669934188] [2020-09-15 01:19:22,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630274921] [2020-09-15 01:19:22,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:22,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:22,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:22,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:22,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:22,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:22,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:22,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:22,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91723724] [2020-09-15 01:19:22,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:22,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:22,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:22,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:22,976 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:19:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:23,541 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-15 01:19:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:23,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:23,543 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:19:23,543 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 01:19:23,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 01:19:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-15 01:19:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:23,546 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:19:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:23,546 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:23,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:23,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:23,547 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:23,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:23,751 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:23,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:23,751 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-15 01:19:23,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:23,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503159665] [2020-09-15 01:19:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:23,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503159665] [2020-09-15 01:19:23,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16725807] [2020-09-15 01:19:23,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:23,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 01:19:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:23,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:23,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:23,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:23,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830778909] [2020-09-15 01:19:23,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:23,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:23,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:23,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:23,982 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:19:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:24,449 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-15 01:19:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:19:24,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:24,450 INFO L225 Difference]: With dead ends: 80 [2020-09-15 01:19:24,451 INFO L226 Difference]: Without dead ends: 74 [2020-09-15 01:19:24,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:19:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-15 01:19:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-15 01:19:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:24,454 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-15 01:19:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:24,454 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:24,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:24,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:24,454 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:24,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-15 01:19:24,656 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-15 01:19:24,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:24,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603921409] [2020-09-15 01:19:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:24,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603921409] [2020-09-15 01:19:24,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467386854] [2020-09-15 01:19:24,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:24,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:24,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:24,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:24,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:24,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:24,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:24,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967714822] [2020-09-15 01:19:24,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:24,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:24,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:24,888 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-15 01:19:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:25,520 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-15 01:19:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:25,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:25,522 INFO L225 Difference]: With dead ends: 79 [2020-09-15 01:19:25,522 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:19:25,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:19:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:19:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-15 01:19:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:25,524 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-15 01:19:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:25,525 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:25,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:25,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:25,525 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:25,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:25,726 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-15 01:19:25,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:25,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294911224] [2020-09-15 01:19:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:25,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294911224] [2020-09-15 01:19:25,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279578915] [2020-09-15 01:19:25,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:25,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 01:19:25,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:25,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:25,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:25,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:25,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 01:19:25,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468392393] [2020-09-15 01:19:25,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:19:25,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:25,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:19:25,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:19:25,941 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-15 01:19:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:26,418 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-15 01:19:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:26,419 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-15 01:19:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:26,420 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:19:26,420 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:19:26,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:19:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:19:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-15 01:19:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:19:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-15 01:19:26,422 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-15 01:19:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:26,422 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-15 01:19:26,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:19:26,423 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-15 01:19:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:26,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:26,423 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:26,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-15 01:19:26,624 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:26,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-15 01:19:26,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:26,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294150567] [2020-09-15 01:19:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:26,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294150567] [2020-09-15 01:19:26,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528876711] [2020-09-15 01:19:26,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:26,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 01:19:26,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:26,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:26,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:26,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:26,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:26,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784704661] [2020-09-15 01:19:26,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:26,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:26,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:26,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:26,859 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-15 01:19:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:27,441 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-09-15 01:19:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:27,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:27,443 INFO L225 Difference]: With dead ends: 74 [2020-09-15 01:19:27,443 INFO L226 Difference]: Without dead ends: 66 [2020-09-15 01:19:27,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:19:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-15 01:19:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-09-15 01:19:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 01:19:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-15 01:19:27,445 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-15 01:19:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:27,446 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-15 01:19:27,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-15 01:19:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 01:19:27,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:27,446 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:27,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:27,647 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:27,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-15 01:19:27,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:27,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519418300] [2020-09-15 01:19:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:27,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519418300] [2020-09-15 01:19:27,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141889112] [2020-09-15 01:19:27,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:27,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:19:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:27,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:27,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:27,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-15 01:19:27,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162543316] [2020-09-15 01:19:27,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:27,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:27,888 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-15 01:19:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:28,528 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-15 01:19:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:28,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 01:19:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:28,530 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:19:28,530 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:19:28,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:19:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:19:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-15 01:19:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:19:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-15 01:19:28,532 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-15 01:19:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:28,532 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-15 01:19:28,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-15 01:19:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:28,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:28,533 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:28,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-15 01:19:28,734 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:28,735 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-15 01:19:28,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:28,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369775994] [2020-09-15 01:19:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:28,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369775994] [2020-09-15 01:19:28,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222911847] [2020-09-15 01:19:28,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:28,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:28,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:28,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:28,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:28,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328736783] [2020-09-15 01:19:28,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:28,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:28,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:28,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:28,991 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-15 01:19:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:29,650 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-15 01:19:29,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:29,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:29,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:29,651 INFO L225 Difference]: With dead ends: 72 [2020-09-15 01:19:29,651 INFO L226 Difference]: Without dead ends: 67 [2020-09-15 01:19:29,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:19:29,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-15 01:19:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-15 01:19:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:19:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-15 01:19:29,653 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-15 01:19:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:29,653 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-15 01:19:29,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-15 01:19:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:29,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:29,654 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:29,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-15 01:19:29,855 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-15 01:19:29,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:29,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655310986] [2020-09-15 01:19:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:30,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655310986] [2020-09-15 01:19:30,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955442928] [2020-09-15 01:19:30,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:30,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:30,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:30,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:30,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:30,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:30,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:30,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102517485] [2020-09-15 01:19:30,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:30,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:30,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:30,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:30,112 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-15 01:19:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:30,393 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-15 01:19:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:19:30,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:30,395 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:19:30,395 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 01:19:30,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:19:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 01:19:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-15 01:19:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:19:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-15 01:19:30,399 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-15 01:19:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:30,399 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-15 01:19:30,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-15 01:19:30,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:30,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:30,400 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:30,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:30,610 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:30,611 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-15 01:19:30,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:30,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606607265] [2020-09-15 01:19:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:30,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606607265] [2020-09-15 01:19:30,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433998822] [2020-09-15 01:19:30,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:30,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:30,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:30,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:30,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:30,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:30,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:30,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:30,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209660575] [2020-09-15 01:19:30,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:30,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:30,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:30,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:30,905 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-15 01:19:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:31,244 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-15 01:19:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:19:31,245 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:31,246 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:19:31,246 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:19:31,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:19:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:19:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-15 01:19:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 01:19:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-15 01:19:31,249 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-15 01:19:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:31,249 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-15 01:19:31,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-15 01:19:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:31,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:31,250 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:31,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:31,459 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-15 01:19:31,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:31,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101580279] [2020-09-15 01:19:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:31,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101580279] [2020-09-15 01:19:31,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664686312] [2020-09-15 01:19:31,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:31,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:19:31,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:31,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:31,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:31,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139107175] [2020-09-15 01:19:31,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:31,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:31,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:31,718 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-15 01:19:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:32,077 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-15 01:19:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:32,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:32,078 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:19:32,078 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:19:32,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:19:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:19:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-15 01:19:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-15 01:19:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-15 01:19:32,088 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-15 01:19:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:32,088 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-15 01:19:32,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-15 01:19:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:32,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:32,089 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:32,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:32,293 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-15 01:19:32,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:32,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433799316] [2020-09-15 01:19:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:32,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433799316] [2020-09-15 01:19:32,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948776853] [2020-09-15 01:19:32,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:32,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:19:32,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:32,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:32,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:32,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:32,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:32,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:32,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725094083] [2020-09-15 01:19:32,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:32,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:32,564 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-15 01:19:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:32,967 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-15 01:19:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:32,968 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:32,969 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:19:32,969 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:19:32,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:19:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:19:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-15 01:19:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:19:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-15 01:19:32,973 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-15 01:19:32,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:32,974 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-15 01:19:32,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-15 01:19:32,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:32,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:32,975 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:33,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:33,186 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:33,187 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-15 01:19:33,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:33,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613871507] [2020-09-15 01:19:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:33,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613871507] [2020-09-15 01:19:33,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251057455] [2020-09-15 01:19:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:33,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:33,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:33,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:33,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:33,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386228531] [2020-09-15 01:19:33,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:33,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:33,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:33,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:33,503 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-15 01:19:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:34,016 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-15 01:19:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:19:34,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:34,018 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:19:34,018 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:19:34,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:19:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-15 01:19:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:19:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-15 01:19:34,022 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-15 01:19:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:34,023 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-15 01:19:34,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-15 01:19:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:34,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:34,024 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:34,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-15 01:19:34,234 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-15 01:19:34,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:34,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144551852] [2020-09-15 01:19:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:34,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144551852] [2020-09-15 01:19:34,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119121227] [2020-09-15 01:19:34,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:34,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:34,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:34,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:34,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:34,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:34,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:34,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643081673] [2020-09-15 01:19:34,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:34,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:34,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:34,513 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-15 01:19:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:34,992 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-15 01:19:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:34,992 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:34,993 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:19:34,993 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:19:34,994 INFO L675 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 [2020-09-15 01:19:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:19:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-15 01:19:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:19:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-15 01:19:34,997 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-15 01:19:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:34,997 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-15 01:19:34,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-15 01:19:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:34,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:34,997 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:35,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:35,198 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:35,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-15 01:19:35,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:35,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194287150] [2020-09-15 01:19:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:35,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194287150] [2020-09-15 01:19:35,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998284059] [2020-09-15 01:19:35,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:35,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:35,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:35,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:35,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:35,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:35,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:35,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000965827] [2020-09-15 01:19:35,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:35,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:35,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:35,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:35,417 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-15 01:19:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:35,931 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-15 01:19:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:35,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:35,932 INFO L225 Difference]: With dead ends: 97 [2020-09-15 01:19:35,933 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:19:35,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:19:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:19:35,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-15 01:19:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:19:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-15 01:19:35,935 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-15 01:19:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:35,936 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-15 01:19:35,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-15 01:19:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:35,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:35,936 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:36,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-15 01:19:36,137 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:36,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-15 01:19:36,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:36,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583309106] [2020-09-15 01:19:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:36,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583309106] [2020-09-15 01:19:36,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315054207] [2020-09-15 01:19:36,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:36,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:36,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:36,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:36,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:36,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:36,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:36,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940449194] [2020-09-15 01:19:36,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:36,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:36,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:36,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:36,399 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-15 01:19:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:36,982 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-15 01:19:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:36,983 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:36,983 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:19:36,984 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:19:36,984 INFO L675 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 [2020-09-15 01:19:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:19:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-15 01:19:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-15 01:19:36,988 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-15 01:19:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:36,988 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-15 01:19:36,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-15 01:19:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:36,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:36,991 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:37,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:37,200 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-15 01:19:37,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:37,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384387709] [2020-09-15 01:19:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:37,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384387709] [2020-09-15 01:19:37,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214669428] [2020-09-15 01:19:37,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:37,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:19:37,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:37,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:37,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:37,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:37,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319272187] [2020-09-15 01:19:37,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:37,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:37,439 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-15 01:19:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:37,994 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-15 01:19:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:19:37,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:37,996 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:19:37,996 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:19:37,997 INFO L675 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 [2020-09-15 01:19:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:19:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-15 01:19:38,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 01:19:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-15 01:19:38,002 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-15 01:19:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:38,003 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-15 01:19:38,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-15 01:19:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:38,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:38,003 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:38,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-15 01:19:38,214 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-15 01:19:38,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:38,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565607801] [2020-09-15 01:19:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:38,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565607801] [2020-09-15 01:19:38,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708180579] [2020-09-15 01:19:38,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:38,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:19:38,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:38,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:38,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:38,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:38,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:38,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:38,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183719064] [2020-09-15 01:19:38,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:38,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:38,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:38,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:38,485 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-15 01:19:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:39,198 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-15 01:19:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:19:39,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:39,200 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:19:39,200 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 01:19:39,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:19:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 01:19:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-15 01:19:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:19:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-15 01:19:39,204 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-15 01:19:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:39,204 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-15 01:19:39,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-15 01:19:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:39,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:39,204 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:39,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:39,405 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:39,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-15 01:19:39,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:39,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463094470] [2020-09-15 01:19:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:39,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463094470] [2020-09-15 01:19:39,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161270288] [2020-09-15 01:19:39,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:39,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:39,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:39,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:39,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 01:19:39,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387057680] [2020-09-15 01:19:39,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:19:39,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:39,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:19:39,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:19:39,643 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-15 01:19:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:40,250 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-15 01:19:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:19:40,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-15 01:19:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:40,251 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:19:40,252 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 01:19:40,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:19:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 01:19:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-15 01:19:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:19:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-15 01:19:40,254 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-15 01:19:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:40,254 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-15 01:19:40,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:19:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-15 01:19:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 01:19:40,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:40,255 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:40,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:40,457 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-15 01:19:40,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:40,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797718676] [2020-09-15 01:19:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:40,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797718676] [2020-09-15 01:19:40,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526658560] [2020-09-15 01:19:40,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:40,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:40,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:40,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 01:19:40,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:40,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:40,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:40,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-15 01:19:40,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068310030] [2020-09-15 01:19:40,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:40,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:40,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:40,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:40,707 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-15 01:19:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:41,462 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-15 01:19:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:19:41,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 01:19:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:41,464 INFO L225 Difference]: With dead ends: 93 [2020-09-15 01:19:41,464 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:19:41,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:19:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:19:41,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-15 01:19:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 01:19:41,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-15 01:19:41,467 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-15 01:19:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:41,467 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-15 01:19:41,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-15 01:19:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:41,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:41,468 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:41,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:41,669 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:41,669 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-15 01:19:41,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:41,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163739469] [2020-09-15 01:19:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:41,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163739469] [2020-09-15 01:19:41,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057583199] [2020-09-15 01:19:41,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:41,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:41,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:41,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:41,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:41,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923871902] [2020-09-15 01:19:41,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:41,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:41,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:41,955 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-15 01:19:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:42,321 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-15 01:19:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:42,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:42,323 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:19:42,323 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:19:42,323 INFO L675 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 [2020-09-15 01:19:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:19:42,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-15 01:19:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:42,326 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:42,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:42,327 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:42,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:42,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:42,327 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:42,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:42,536 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-15 01:19:42,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:42,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773545324] [2020-09-15 01:19:42,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:42,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773545324] [2020-09-15 01:19:42,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594726184] [2020-09-15 01:19:42,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:42,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:42,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:42,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:42,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:42,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:42,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156221045] [2020-09-15 01:19:42,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:42,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:42,885 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:43,322 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-15 01:19:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:43,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:43,324 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:19:43,324 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:19:43,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:19:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-15 01:19:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:43,328 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:43,328 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:43,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:43,329 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:43,329 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:43,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:43,530 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:43,531 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-15 01:19:43,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:43,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535030307] [2020-09-15 01:19:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:43,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535030307] [2020-09-15 01:19:43,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009469597] [2020-09-15 01:19:43,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:43,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:19:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:43,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:43,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:43,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:43,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940711037] [2020-09-15 01:19:43,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:43,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:43,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:43,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:43,816 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:44,250 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-15 01:19:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:19:44,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:44,252 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:19:44,252 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:19:44,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:19:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:19:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-15 01:19:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:44,256 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:44,256 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:44,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:44,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:44,257 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:44,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:44,458 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:44,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-15 01:19:44,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:44,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479909335] [2020-09-15 01:19:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:44,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479909335] [2020-09-15 01:19:44,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294771163] [2020-09-15 01:19:44,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:44,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:19:44,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:44,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:44,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:44,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:44,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:44,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:44,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972691371] [2020-09-15 01:19:44,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:44,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:44,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:44,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:44,769 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:45,301 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-15 01:19:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:19:45,302 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:45,303 INFO L225 Difference]: With dead ends: 97 [2020-09-15 01:19:45,303 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:19:45,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:19:45,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:19:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-15 01:19:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:45,306 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:45,306 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:45,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:45,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:45,307 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:45,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:45,511 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-15 01:19:45,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:45,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819881796] [2020-09-15 01:19:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:45,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819881796] [2020-09-15 01:19:45,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072201201] [2020-09-15 01:19:45,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:45,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:45,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:45,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:45,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359515572] [2020-09-15 01:19:45,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:45,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:45,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:45,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:45,783 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:46,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:46,263 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-15 01:19:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:19:46,264 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:46,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:46,265 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:19:46,265 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 01:19:46,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:19:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 01:19:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-15 01:19:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:46,267 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:46,268 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:46,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:46,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:46,268 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:46,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-15 01:19:46,469 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-15 01:19:46,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:46,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636013549] [2020-09-15 01:19:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:46,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636013549] [2020-09-15 01:19:46,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615203616] [2020-09-15 01:19:46,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:46,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:46,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:46,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:46,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:46,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:46,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635734330] [2020-09-15 01:19:46,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:46,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:46,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:46,772 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:47,391 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-15 01:19:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:19:47,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:47,392 INFO L225 Difference]: With dead ends: 93 [2020-09-15 01:19:47,392 INFO L226 Difference]: Without dead ends: 87 [2020-09-15 01:19:47,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:19:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-15 01:19:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-15 01:19:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:47,394 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:47,395 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:47,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:47,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:47,396 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:47,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:47,597 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-15 01:19:47,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:47,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673842511] [2020-09-15 01:19:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:47,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673842511] [2020-09-15 01:19:47,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846858691] [2020-09-15 01:19:47,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:47,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:47,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:47,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:47,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:47,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:47,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:47,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845380732] [2020-09-15 01:19:47,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:47,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:47,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:47,849 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:48,383 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-15 01:19:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:19:48,384 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:48,385 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:19:48,385 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:19:48,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:19:48,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:19:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-15 01:19:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:48,388 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:48,388 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:48,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:48,389 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:48,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:48,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:48,389 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:48,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-15 01:19:48,594 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-15 01:19:48,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:48,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215092698] [2020-09-15 01:19:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:48,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215092698] [2020-09-15 01:19:48,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024662211] [2020-09-15 01:19:48,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:48,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:48,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:48,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:48,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:48,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:48,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:48,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:48,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721840342] [2020-09-15 01:19:48,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:48,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:48,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:48,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:48,885 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:49,583 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-15 01:19:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:19:49,584 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:49,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:49,585 INFO L225 Difference]: With dead ends: 89 [2020-09-15 01:19:49,585 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 01:19:49,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:19:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 01:19:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-15 01:19:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:49,588 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:49,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:49,589 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:49,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:49,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:49,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:49,590 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:49,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:49,798 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:49,799 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-15 01:19:49,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:49,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674769677] [2020-09-15 01:19:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:49,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674769677] [2020-09-15 01:19:49,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765337157] [2020-09-15 01:19:49,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:50,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 01:19:50,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:50,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:50,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:50,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:50,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:50,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462853427] [2020-09-15 01:19:50,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:50,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:50,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:50,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:50,070 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:50,674 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-15 01:19:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:19:50,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:50,676 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:19:50,676 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:19:50,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:19:50,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:19:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-15 01:19:50,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:19:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:19:50,679 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-15 01:19:50,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:50,679 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:19:50,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:50,679 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:19:50,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:50,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:50,680 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:50,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:50,889 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-15 01:19:50,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:50,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035049777] [2020-09-15 01:19:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:51,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035049777] [2020-09-15 01:19:51,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812820759] [2020-09-15 01:19:51,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:51,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 01:19:51,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:51,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:51,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:51,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:51,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:51,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:51,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891128629] [2020-09-15 01:19:51,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:51,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:51,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:51,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:51,157 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-15 01:19:51,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:51,965 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-15 01:19:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:19:51,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:51,966 INFO L225 Difference]: With dead ends: 85 [2020-09-15 01:19:51,967 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:19:51,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:19:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:19:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-15 01:19:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:19:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:19:51,969 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-15 01:19:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:51,969 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:19:51,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:19:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:51,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:51,969 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:52,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:52,171 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:52,172 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-15 01:19:52,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:52,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617722788] [2020-09-15 01:19:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:52,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617722788] [2020-09-15 01:19:52,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189871507] [2020-09-15 01:19:52,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:52,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:52,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:52,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:52,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 01:19:52,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369192313] [2020-09-15 01:19:52,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:19:52,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:52,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:19:52,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:19:52,437 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-15 01:19:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:53,115 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-15 01:19:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:19:53,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-15 01:19:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:53,116 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:19:53,117 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:19:53,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:19:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:19:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-15 01:19:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:19:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-15 01:19:53,119 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-15 01:19:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:53,120 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-15 01:19:53,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:19:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-15 01:19:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:53,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:53,120 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:53,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:53,321 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-15 01:19:53,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:53,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904447098] [2020-09-15 01:19:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:53,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904447098] [2020-09-15 01:19:53,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263011548] [2020-09-15 01:19:53,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:53,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:19:53,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:53,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:53,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:53,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:53,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:53,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:53,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418604343] [2020-09-15 01:19:53,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:53,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:53,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:53,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:53,621 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-15 01:19:54,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:54,508 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-15 01:19:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:19:54,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:54,510 INFO L225 Difference]: With dead ends: 82 [2020-09-15 01:19:54,510 INFO L226 Difference]: Without dead ends: 74 [2020-09-15 01:19:54,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:19:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-15 01:19:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-15 01:19:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 01:19:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-15 01:19:54,513 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-15 01:19:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:54,514 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-15 01:19:54,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-15 01:19:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 01:19:54,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:54,514 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:54,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:54,724 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:54,725 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-15 01:19:54,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:54,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531053088] [2020-09-15 01:19:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:54,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531053088] [2020-09-15 01:19:54,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212168064] [2020-09-15 01:19:54,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:54,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 01:19:54,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 01:19:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:54,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:55,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:55,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-15 01:19:55,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762413091] [2020-09-15 01:19:55,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:55,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:55,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:55,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:55,003 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-15 01:19:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:55,814 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-15 01:19:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:19:55,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 01:19:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:55,816 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:19:55,816 INFO L226 Difference]: Without dead ends: 87 [2020-09-15 01:19:55,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:19:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-15 01:19:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-15 01:19:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:19:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-15 01:19:55,820 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-15 01:19:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:55,820 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-15 01:19:55,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-15 01:19:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:55,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:55,821 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:56,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:56,029 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:56,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:56,030 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-15 01:19:56,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:56,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330434562] [2020-09-15 01:19:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:56,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330434562] [2020-09-15 01:19:56,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648802626] [2020-09-15 01:19:56,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:56,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:19:56,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:56,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:56,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:56,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:19:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:56,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:56,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:19:56,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363933770] [2020-09-15 01:19:56,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:19:56,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:56,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:19:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:19:56,329 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-15 01:19:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:57,220 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-15 01:19:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:19:57,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:19:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:57,222 INFO L225 Difference]: With dead ends: 78 [2020-09-15 01:19:57,222 INFO L226 Difference]: Without dead ends: 73 [2020-09-15 01:19:57,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:19:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-15 01:19:57,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-15 01:19:57,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 01:19:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-15 01:19:57,224 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-15 01:19:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:57,224 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-15 01:19:57,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:19:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-15 01:19:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:57,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:57,225 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:57,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-15 01:19:57,426 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:57,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-15 01:19:57,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:57,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562990542] [2020-09-15 01:19:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:57,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562990542] [2020-09-15 01:19:57,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897940454] [2020-09-15 01:19:57,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:57,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:19:57,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:57,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:57,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:57,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:19:57,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304970401] [2020-09-15 01:19:57,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:57,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:57,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:57,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:57,757 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-15 01:19:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:58,152 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-15 01:19:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:19:58,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:19:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:58,154 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:19:58,154 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:19:58,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:19:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:19:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-15 01:19:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:19:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-15 01:19:58,157 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-15 01:19:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:58,157 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-15 01:19:58,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:19:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-15 01:19:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:58,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:58,158 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:58,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:19:58,359 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:58,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:58,359 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-15 01:19:58,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:58,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025801026] [2020-09-15 01:19:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:58,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025801026] [2020-09-15 01:19:58,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780183901] [2020-09-15 01:19:58,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:58,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:19:58,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:19:58,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:58,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:58,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:19:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:58,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:58,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:19:58,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188986313] [2020-09-15 01:19:58,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:19:58,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:58,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:19:58,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:19:58,701 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-15 01:19:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:19:59,160 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-15 01:19:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:19:59,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:19:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:19:59,162 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:19:59,162 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:19:59,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:19:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:19:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-15 01:19:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 01:19:59,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-15 01:19:59,164 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-15 01:19:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:19:59,165 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-15 01:19:59,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:19:59,165 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-15 01:19:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:19:59,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:19:59,165 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:19:59,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-15 01:19:59,373 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:19:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:19:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-15 01:19:59,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:19:59,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907704228] [2020-09-15 01:19:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:19:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:59,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907704228] [2020-09-15 01:19:59,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978341613] [2020-09-15 01:19:59,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:19:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:19:59,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:19:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:19:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:19:59,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:19:59,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:19:59,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810768099] [2020-09-15 01:19:59,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:19:59,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:19:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:19:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:19:59,697 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-15 01:20:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:00,183 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-15 01:20:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:20:00,184 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:20:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:00,185 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:20:00,185 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:20:00,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:20:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:20:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-15 01:20:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 01:20:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-15 01:20:00,188 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-15 01:20:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:00,188 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-15 01:20:00,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:20:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-15 01:20:00,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:00,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:00,190 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:00,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:00,390 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-15 01:20:00,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:00,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842865695] [2020-09-15 01:20:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:00,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842865695] [2020-09-15 01:20:00,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531132163] [2020-09-15 01:20:00,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:00,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:00,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:00,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:00,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:00,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:00,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:00,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:20:00,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205403740] [2020-09-15 01:20:00,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:00,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:00,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:00,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:00,783 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-15 01:20:01,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:01,267 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-15 01:20:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:20:01,268 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:01,269 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:20:01,269 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:20:01,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:20:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:20:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-15 01:20:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:20:01,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-15 01:20:01,271 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-15 01:20:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:01,272 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-15 01:20:01,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-15 01:20:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:01,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:01,272 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:01,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:01,473 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-15 01:20:01,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:01,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788031626] [2020-09-15 01:20:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:01,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788031626] [2020-09-15 01:20:01,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802172452] [2020-09-15 01:20:01,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:01,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:20:01,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:01,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:01,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:01,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:20:01,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276900352] [2020-09-15 01:20:01,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:20:01,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:20:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:20:01,766 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-15 01:20:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:02,279 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-15 01:20:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:20:02,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:20:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:02,281 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:20:02,281 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:20:02,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:20:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:20:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-15 01:20:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 01:20:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-15 01:20:02,284 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-15 01:20:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:02,285 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-15 01:20:02,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:20:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-15 01:20:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:02,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:02,286 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:02,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-15 01:20:02,495 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:02,496 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-15 01:20:02,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:02,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388919130] [2020-09-15 01:20:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:02,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388919130] [2020-09-15 01:20:02,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546921879] [2020-09-15 01:20:02,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:02,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:02,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:02,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:02,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:02,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:02,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:20:02,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445672586] [2020-09-15 01:20:02,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:02,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:02,846 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-15 01:20:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:03,490 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-15 01:20:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:20:03,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:03,493 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:20:03,493 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:20:03,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:20:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:20:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-15 01:20:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:20:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-15 01:20:03,496 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-15 01:20:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:03,496 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-15 01:20:03,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-15 01:20:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:03,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:03,497 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:03,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-15 01:20:03,698 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:03,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-15 01:20:03,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:03,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369475442] [2020-09-15 01:20:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:03,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369475442] [2020-09-15 01:20:03,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216086767] [2020-09-15 01:20:03,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:03,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:20:03,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:03,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:04,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:04,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:20:04,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293816843] [2020-09-15 01:20:04,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:20:04,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:04,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:20:04,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:20:04,002 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-15 01:20:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:04,590 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-15 01:20:04,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:20:04,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:20:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:04,592 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:20:04,592 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:20:04,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:20:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:20:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-15 01:20:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 01:20:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-15 01:20:04,594 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-15 01:20:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:04,595 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-15 01:20:04,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:20:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-15 01:20:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:04,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:04,595 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:04,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:04,798 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-15 01:20:04,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:04,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494317363] [2020-09-15 01:20:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:05,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494317363] [2020-09-15 01:20:05,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670285993] [2020-09-15 01:20:05,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:05,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:20:05,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:05,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:05,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:05,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:05,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:05,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:20:05,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220636909] [2020-09-15 01:20:05,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:05,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:05,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:05,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:05,110 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-15 01:20:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:05,852 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-15 01:20:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:20:05,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:05,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:05,854 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:20:05,854 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:20:05,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:20:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:20:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-15 01:20:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:20:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-15 01:20:05,858 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-15 01:20:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:05,858 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-15 01:20:05,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-15 01:20:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:05,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:05,859 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:06,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-15 01:20:06,062 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-15 01:20:06,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:06,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13107225] [2020-09-15 01:20:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:06,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13107225] [2020-09-15 01:20:06,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296521410] [2020-09-15 01:20:06,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:06,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:06,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:20:06,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818073127] [2020-09-15 01:20:06,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:20:06,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:06,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:20:06,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:20:06,363 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-15 01:20:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:07,030 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-15 01:20:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:20:07,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:20:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:07,032 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:20:07,032 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 01:20:07,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:20:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 01:20:07,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-15 01:20:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:20:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-15 01:20:07,036 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-15 01:20:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:07,037 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-15 01:20:07,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:20:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-15 01:20:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:07,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:07,037 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:07,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:07,247 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:07,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-15 01:20:07,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:07,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407645719] [2020-09-15 01:20:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:07,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407645719] [2020-09-15 01:20:07,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442773428] [2020-09-15 01:20:07,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:07,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:07,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:07,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:07,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:07,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:07,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:20:07,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387370264] [2020-09-15 01:20:07,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:07,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:07,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:07,575 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-15 01:20:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:08,400 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-15 01:20:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:20:08,400 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:08,401 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:20:08,401 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:20:08,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:20:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:20:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-15 01:20:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:20:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-15 01:20:08,404 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-15 01:20:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:08,405 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-15 01:20:08,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-15 01:20:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:08,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:08,405 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:08,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-15 01:20:08,606 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:08,607 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-15 01:20:08,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:08,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094532504] [2020-09-15 01:20:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:08,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094532504] [2020-09-15 01:20:08,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165981493] [2020-09-15 01:20:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:08,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:20:08,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:08,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:08,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:08,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:20:08,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086946541] [2020-09-15 01:20:08,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:20:08,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:08,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:20:08,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:20:08,890 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-15 01:20:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:09,632 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-15 01:20:09,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:20:09,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:20:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:09,634 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:20:09,634 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:20:09,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:20:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:20:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-15 01:20:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:20:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-15 01:20:09,636 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-15 01:20:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:09,636 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-15 01:20:09,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:20:09,637 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-15 01:20:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:09,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:09,637 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:09,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:09,838 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-15 01:20:09,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:09,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859468103] [2020-09-15 01:20:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:10,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859468103] [2020-09-15 01:20:10,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688607005] [2020-09-15 01:20:10,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:10,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:10,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:10,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:10,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:10,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:10,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:10,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:20:10,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749384886] [2020-09-15 01:20:10,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:10,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:10,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:10,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:10,145 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-15 01:20:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:11,044 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-15 01:20:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:20:11,045 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:11,046 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:20:11,046 INFO L226 Difference]: Without dead ends: 94 [2020-09-15 01:20:11,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:20:11,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-15 01:20:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-15 01:20:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:20:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-15 01:20:11,049 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-15 01:20:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:11,049 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-15 01:20:11,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-15 01:20:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:11,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:11,058 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:11,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-15 01:20:11,265 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-15 01:20:11,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:11,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037932616] [2020-09-15 01:20:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:11,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037932616] [2020-09-15 01:20:11,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168391844] [2020-09-15 01:20:11,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:11,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:20:11,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:11,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:11,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:11,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 01:20:11,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363504301] [2020-09-15 01:20:11,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:20:11,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:11,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:20:11,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:20:11,558 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-15 01:20:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:12,308 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-15 01:20:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:12,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-15 01:20:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:12,310 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:20:12,310 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:20:12,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:20:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:20:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-15 01:20:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:20:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-15 01:20:12,313 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-15 01:20:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:12,313 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-15 01:20:12,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:20:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-15 01:20:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 01:20:12,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:12,314 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:12,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-15 01:20:12,522 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:12,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-15 01:20:12,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:12,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982301791] [2020-09-15 01:20:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:12,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982301791] [2020-09-15 01:20:12,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704278977] [2020-09-15 01:20:12,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:12,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:20:12,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:12,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 01:20:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:12,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:12,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:12,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-15 01:20:12,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600394104] [2020-09-15 01:20:12,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:12,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:12,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:12,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:12,850 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-15 01:20:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:13,952 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-15 01:20:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:20:13,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 01:20:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:13,954 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:20:13,954 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:20:13,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:20:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:20:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-15 01:20:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:20:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-15 01:20:13,958 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-15 01:20:13,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:13,958 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-15 01:20:13,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-15 01:20:13,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:13,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:13,959 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:14,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:14,170 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:14,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-15 01:20:14,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:14,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888204860] [2020-09-15 01:20:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:14,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888204860] [2020-09-15 01:20:14,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193448208] [2020-09-15 01:20:14,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:14,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:14,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:14,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:14,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626252093] [2020-09-15 01:20:14,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:14,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:14,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:14,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:14,506 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-15 01:20:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:14,972 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-15 01:20:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:20:14,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:14,973 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:20:14,974 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:20:14,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:20:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:20:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-15 01:20:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:14,976 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:14,977 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:14,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:14,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:14,978 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:15,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:15,185 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:15,186 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-15 01:20:15,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:15,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754787602] [2020-09-15 01:20:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:15,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754787602] [2020-09-15 01:20:15,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119999533] [2020-09-15 01:20:15,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:15,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:15,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:15,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:15,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:15,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:15,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847438398] [2020-09-15 01:20:15,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:15,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:15,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:15,566 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:16,131 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-15 01:20:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:20:16,132 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:16,132 INFO L225 Difference]: With dead ends: 111 [2020-09-15 01:20:16,133 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:20:16,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:20:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:20:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-15 01:20:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:16,135 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:16,135 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:16,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:16,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:16,136 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:16,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-15 01:20:16,337 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-15 01:20:16,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:16,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278941618] [2020-09-15 01:20:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:16,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278941618] [2020-09-15 01:20:16,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481000773] [2020-09-15 01:20:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:16,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:20:16,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:16,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:16,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:16,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:16,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:16,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536191880] [2020-09-15 01:20:16,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:16,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:16,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:16,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:16,688 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:17,220 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-15 01:20:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:20:17,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:17,222 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:20:17,222 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:20:17,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:20:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:20:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-15 01:20:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:17,224 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:17,224 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:17,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:17,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:17,225 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:17,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:17,434 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:17,435 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-15 01:20:17,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:17,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315393810] [2020-09-15 01:20:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:17,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315393810] [2020-09-15 01:20:17,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601392691] [2020-09-15 01:20:17,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:17,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:17,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:17,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:17,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:17,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:17,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063532810] [2020-09-15 01:20:17,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:17,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:17,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:17,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:17,790 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:18,456 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-15 01:20:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:20:18,457 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:18,457 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:20:18,458 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:20:18,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:20:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:20:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-15 01:20:18,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:18,460 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:18,461 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:18,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:18,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:18,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:18,461 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:18,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-15 01:20:18,662 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:18,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:18,663 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-15 01:20:18,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:18,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117388718] [2020-09-15 01:20:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:18,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117388718] [2020-09-15 01:20:18,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733355801] [2020-09-15 01:20:18,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:18,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:20:18,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:18,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:18,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:18,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:18,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500543298] [2020-09-15 01:20:18,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:18,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:18,995 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:19,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:19,598 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-15 01:20:19,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:20:19,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:19,599 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:20:19,600 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:20:19,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:20:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:20:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-15 01:20:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:19,602 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:19,603 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:19,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:19,603 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:19,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:19,603 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:19,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-15 01:20:19,812 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-15 01:20:19,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:19,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531978918] [2020-09-15 01:20:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:20,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531978918] [2020-09-15 01:20:20,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039788505] [2020-09-15 01:20:20,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:20,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:20:20,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:20,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:20,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:20,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:20,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289387364] [2020-09-15 01:20:20,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:20,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:20,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:20,176 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:20,945 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-15 01:20:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:20:20,946 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:20,947 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:20:20,947 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:20:20,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:20:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:20:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-15 01:20:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:20,950 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:20,950 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:20,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:20,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:20,951 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:21,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-15 01:20:21,158 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:21,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-15 01:20:21,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:21,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130243655] [2020-09-15 01:20:21,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:21,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130243655] [2020-09-15 01:20:21,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539558556] [2020-09-15 01:20:21,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:21,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:21,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:21,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:21,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111777807] [2020-09-15 01:20:21,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:21,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:21,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:21,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:21,480 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:22,134 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-15 01:20:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:20:22,135 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:22,135 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:20:22,136 INFO L226 Difference]: Without dead ends: 94 [2020-09-15 01:20:22,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:20:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-15 01:20:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-15 01:20:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:22,139 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:22,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:22,140 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:22,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:22,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:22,141 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:22,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:22,344 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:22,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:22,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-15 01:20:22,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:22,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754181268] [2020-09-15 01:20:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:22,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754181268] [2020-09-15 01:20:22,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264900561] [2020-09-15 01:20:22,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:22,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:22,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:22,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:22,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:22,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800667656] [2020-09-15 01:20:22,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:22,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:22,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:22,678 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:23,540 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-15 01:20:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:20:23,541 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:23,542 INFO L225 Difference]: With dead ends: 99 [2020-09-15 01:20:23,542 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 01:20:23,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:20:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 01:20:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-15 01:20:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:23,545 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:23,545 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:23,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:23,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:23,546 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:23,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-15 01:20:23,747 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:23,747 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-15 01:20:23,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:23,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696500306] [2020-09-15 01:20:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:23,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696500306] [2020-09-15 01:20:23,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895739555] [2020-09-15 01:20:23,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:24,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:20:24,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:24,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:24,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:24,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:24,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:24,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96716674] [2020-09-15 01:20:24,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:24,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:24,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:24,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:24,039 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:24,786 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-15 01:20:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:20:24,786 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:24,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:24,787 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:20:24,787 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:20:24,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:20:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:20:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-15 01:20:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:24,791 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:24,791 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:24,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:24,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:24,792 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:24,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:24,994 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:24,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-15 01:20:24,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:24,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495638098] [2020-09-15 01:20:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:25,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495638098] [2020-09-15 01:20:25,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899663887] [2020-09-15 01:20:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:25,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:25,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:25,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:25,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:25,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:25,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:25,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665704389] [2020-09-15 01:20:25,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:25,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:25,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:25,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:25,339 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:26,321 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-15 01:20:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:20:26,322 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:26,322 INFO L225 Difference]: With dead ends: 95 [2020-09-15 01:20:26,322 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 01:20:26,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:20:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 01:20:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-15 01:20:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:26,325 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:26,325 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:26,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:26,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:26,326 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:26,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:26,527 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:26,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-15 01:20:26,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:26,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185124166] [2020-09-15 01:20:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:26,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185124166] [2020-09-15 01:20:26,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782471890] [2020-09-15 01:20:26,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:26,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 01:20:26,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:26,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:26,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:26,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:26,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937176019] [2020-09-15 01:20:26,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:26,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:26,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:26,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:26,835 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:27,622 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-15 01:20:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:20:27,623 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:27,624 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:20:27,624 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 01:20:27,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:20:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 01:20:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-15 01:20:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:27,626 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-15 01:20:27,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:27,627 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:27,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:27,627 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:27,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:27,627 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:27,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:27,835 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:27,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-15 01:20:27,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:27,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722480862] [2020-09-15 01:20:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:28,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722480862] [2020-09-15 01:20:28,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898290202] [2020-09-15 01:20:28,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:28,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 01:20:28,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:28,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:28,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:28,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:28,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033776278] [2020-09-15 01:20:28,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:28,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:28,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:28,174 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-15 01:20:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:29,190 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-15 01:20:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:20:29,191 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:29,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:29,192 INFO L225 Difference]: With dead ends: 91 [2020-09-15 01:20:29,192 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:20:29,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:20:29,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:20:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-15 01:20:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:29,194 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-15 01:20:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:29,194 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:29,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:29,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:29,195 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:29,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:29,396 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:29,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:29,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-15 01:20:29,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:29,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066305544] [2020-09-15 01:20:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:29,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066305544] [2020-09-15 01:20:29,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266927900] [2020-09-15 01:20:29,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:29,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:29,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 01:20:29,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542748792] [2020-09-15 01:20:29,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:20:29,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:29,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:20:29,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:20:29,750 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-15 01:20:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:30,600 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-15 01:20:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:30,601 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-15 01:20:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:30,601 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:20:30,602 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:20:30,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:20:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:20:30,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-15 01:20:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:20:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-15 01:20:30,605 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-15 01:20:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:30,606 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-15 01:20:30,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:20:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-15 01:20:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:30,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:30,606 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:30,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-15 01:20:30,815 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:30,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-15 01:20:30,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:30,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71628209] [2020-09-15 01:20:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:31,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71628209] [2020-09-15 01:20:31,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245215686] [2020-09-15 01:20:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:31,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:31,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:31,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:31,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:31,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:31,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926106203] [2020-09-15 01:20:31,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:31,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:31,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:31,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:31,154 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-15 01:20:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:32,165 INFO L93 Difference]: Finished difference Result 86 states and 213 transitions. [2020-09-15 01:20:32,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:20:32,166 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:32,166 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:20:32,166 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 01:20:32,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:20:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 01:20:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-15 01:20:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 01:20:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-15 01:20:32,169 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-15 01:20:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:32,169 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-15 01:20:32,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:32,169 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-15 01:20:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 01:20:32,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:32,170 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:32,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-15 01:20:32,371 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:32,371 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-15 01:20:32,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:32,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887749119] [2020-09-15 01:20:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:32,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887749119] [2020-09-15 01:20:32,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006180407] [2020-09-15 01:20:32,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:32,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 01:20:32,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:32,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 01:20:32,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:32,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:20:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:32,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:32,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 01:20:32,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051755641] [2020-09-15 01:20:32,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:32,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:32,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:32,703 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-15 01:20:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:33,727 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-15 01:20:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:33,728 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 01:20:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:33,729 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:20:33,729 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:20:33,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:20:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:20:33,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-15 01:20:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:20:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-15 01:20:33,732 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-15 01:20:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:33,732 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-15 01:20:33,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-15 01:20:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:33,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:33,733 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:33,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-15 01:20:33,935 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:33,935 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-15 01:20:33,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:33,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381134131] [2020-09-15 01:20:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:34,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381134131] [2020-09-15 01:20:34,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428924025] [2020-09-15 01:20:34,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:34,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:34,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:34,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:34,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:34,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:20:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:34,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:34,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:34,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760862739] [2020-09-15 01:20:34,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:34,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:34,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:34,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:34,253 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-15 01:20:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:35,375 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-15 01:20:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:35,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:35,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:35,376 INFO L225 Difference]: With dead ends: 84 [2020-09-15 01:20:35,376 INFO L226 Difference]: Without dead ends: 79 [2020-09-15 01:20:35,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:20:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-15 01:20:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-15 01:20:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 01:20:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-15 01:20:35,379 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-15 01:20:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:35,379 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-15 01:20:35,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-15 01:20:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:35,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:35,380 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:35,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-15 01:20:35,581 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:35,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-15 01:20:35,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:35,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91544412] [2020-09-15 01:20:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:35,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91544412] [2020-09-15 01:20:35,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202003674] [2020-09-15 01:20:35,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:35,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:20:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:35,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:35,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:35,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:35,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14553537] [2020-09-15 01:20:35,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:35,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:35,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:35,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:35,978 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-15 01:20:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:36,414 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-15 01:20:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:20:36,415 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:36,415 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:20:36,416 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:20:36,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:20:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:20:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-15 01:20:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:20:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-15 01:20:36,418 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-15 01:20:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:36,418 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-15 01:20:36,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-15 01:20:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:36,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:36,420 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:36,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:36,625 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-15 01:20:36,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:36,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346194555] [2020-09-15 01:20:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:36,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346194555] [2020-09-15 01:20:36,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894398480] [2020-09-15 01:20:36,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:37,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:20:37,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:37,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:37,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:37,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:37,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:37,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:37,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546591226] [2020-09-15 01:20:37,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:37,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:37,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:37,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:37,061 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-15 01:20:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:37,605 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-15 01:20:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:20:37,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:37,607 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:20:37,607 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:20:37,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:20:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:20:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-15 01:20:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:20:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-15 01:20:37,610 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-15 01:20:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:37,610 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-15 01:20:37,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-15 01:20:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:37,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:37,611 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:37,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-15 01:20:37,813 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:37,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:37,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-15 01:20:37,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:37,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439569732] [2020-09-15 01:20:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:38,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439569732] [2020-09-15 01:20:38,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048621322] [2020-09-15 01:20:38,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:38,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:38,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:38,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:38,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597990377] [2020-09-15 01:20:38,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:38,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:38,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:38,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:38,203 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-15 01:20:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:38,809 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-15 01:20:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:20:38,810 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:38,811 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:20:38,811 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:20:38,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:20:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:20:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-15 01:20:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 01:20:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-15 01:20:38,813 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-15 01:20:38,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:38,813 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-15 01:20:38,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:38,813 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-15 01:20:38,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:38,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:38,814 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:39,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-15 01:20:39,021 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:39,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:39,022 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-15 01:20:39,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:39,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522882422] [2020-09-15 01:20:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:39,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522882422] [2020-09-15 01:20:39,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294055280] [2020-09-15 01:20:39,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:39,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:39,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:39,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:39,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:39,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:39,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:39,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914723783] [2020-09-15 01:20:39,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:39,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:39,438 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-15 01:20:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:40,083 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-15 01:20:40,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:20:40,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:40,085 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:20:40,085 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:20:40,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:20:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:20:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-15 01:20:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:20:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-15 01:20:40,088 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-15 01:20:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:40,088 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-15 01:20:40,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-15 01:20:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:40,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:40,088 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:40,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-15 01:20:40,289 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:40,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:40,290 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-15 01:20:40,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:40,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975797170] [2020-09-15 01:20:40,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:40,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975797170] [2020-09-15 01:20:40,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645784935] [2020-09-15 01:20:40,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:40,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:20:40,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:40,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:40,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:40,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:40,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:40,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770472006] [2020-09-15 01:20:40,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:40,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:40,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:40,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:40,665 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-15 01:20:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:41,324 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-15 01:20:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:20:41,324 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:41,325 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:20:41,325 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:20:41,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:20:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:20:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-15 01:20:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:20:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-15 01:20:41,327 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-15 01:20:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:41,327 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-15 01:20:41,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-15 01:20:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:41,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:41,328 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:41,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:41,535 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:41,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:41,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-15 01:20:41,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:41,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994853719] [2020-09-15 01:20:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:41,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994853719] [2020-09-15 01:20:41,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904082869] [2020-09-15 01:20:41,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:41,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:41,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:41,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:41,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:41,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:41,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:41,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:41,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759225692] [2020-09-15 01:20:41,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:41,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:41,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:41,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:41,926 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-15 01:20:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:42,682 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-15 01:20:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:20:42,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:42,684 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:20:42,684 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:20:42,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:20:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:20:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-15 01:20:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:20:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-15 01:20:42,687 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-15 01:20:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:42,687 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-15 01:20:42,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-15 01:20:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:42,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:42,688 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:42,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:42,889 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:42,889 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-15 01:20:42,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:42,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526571859] [2020-09-15 01:20:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:43,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526571859] [2020-09-15 01:20:43,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145727712] [2020-09-15 01:20:43,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:43,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:20:43,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:43,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:43,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:43,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:43,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:43,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316153044] [2020-09-15 01:20:43,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:43,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:43,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:43,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:43,265 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-15 01:20:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:43,990 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-15 01:20:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:20:43,997 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:43,998 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:20:43,998 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:20:43,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:20:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:20:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-15 01:20:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:20:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-15 01:20:44,000 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-15 01:20:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:44,001 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-15 01:20:44,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-15 01:20:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:44,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:44,001 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:44,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:44,202 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:44,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-15 01:20:44,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:44,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472315269] [2020-09-15 01:20:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:44,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472315269] [2020-09-15 01:20:44,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507512483] [2020-09-15 01:20:44,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:44,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:20:44,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:44,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:44,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:44,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:44,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:44,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120736485] [2020-09-15 01:20:44,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:44,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:44,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:44,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:44,602 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-15 01:20:45,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:45,450 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-15 01:20:45,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:20:45,451 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:45,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:45,452 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:20:45,452 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:20:45,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:20:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:20:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-15 01:20:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:20:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-15 01:20:45,455 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-15 01:20:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:45,455 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-15 01:20:45,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-15 01:20:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:45,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:45,456 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:45,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-15 01:20:45,657 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:45,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-15 01:20:45,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:45,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637737032] [2020-09-15 01:20:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:45,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637737032] [2020-09-15 01:20:45,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869890204] [2020-09-15 01:20:45,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:46,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:46,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:46,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498768148] [2020-09-15 01:20:46,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:46,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:46,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:46,020 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-15 01:20:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:46,806 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-15 01:20:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:20:46,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:46,807 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:20:46,807 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:20:46,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:20:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:20:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-15 01:20:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:20:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-15 01:20:46,810 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-15 01:20:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:46,810 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-15 01:20:46,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-15 01:20:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:46,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:46,811 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:47,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:47,012 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:47,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-15 01:20:47,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:47,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101677444] [2020-09-15 01:20:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:47,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101677444] [2020-09-15 01:20:47,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261521399] [2020-09-15 01:20:47,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:47,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:47,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:47,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:47,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:47,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:47,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:47,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087589707] [2020-09-15 01:20:47,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:47,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:47,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:47,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:47,386 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-15 01:20:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:48,351 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-15 01:20:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:20:48,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:48,353 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:20:48,353 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 01:20:48,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:20:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 01:20:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-15 01:20:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:20:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-15 01:20:48,357 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-15 01:20:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:48,357 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-15 01:20:48,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-15 01:20:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:48,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:48,358 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:48,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-15 01:20:48,566 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-15 01:20:48,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:48,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692330975] [2020-09-15 01:20:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:48,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692330975] [2020-09-15 01:20:48,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346674231] [2020-09-15 01:20:48,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:48,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:20:48,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:48,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:48,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:48,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:48,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:48,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313326731] [2020-09-15 01:20:48,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:48,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:48,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:48,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:48,911 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-15 01:20:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:49,769 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-15 01:20:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:20:49,770 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:49,770 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:20:49,770 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:20:49,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:20:49,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:20:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-15 01:20:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:20:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-15 01:20:49,773 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-15 01:20:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:49,773 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-15 01:20:49,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-15 01:20:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:49,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:49,774 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:49,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-15 01:20:49,975 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:49,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-15 01:20:49,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:49,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828194348] [2020-09-15 01:20:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:50,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828194348] [2020-09-15 01:20:50,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953708360] [2020-09-15 01:20:50,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:50,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:50,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:50,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:50,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:50,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:50,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:50,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:50,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981393496] [2020-09-15 01:20:50,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:50,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:50,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:50,349 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-15 01:20:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:51,398 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-15 01:20:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:20:51,399 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:51,400 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:20:51,400 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:20:51,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:20:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:20:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-15 01:20:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:20:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-15 01:20:51,402 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-15 01:20:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:51,403 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-15 01:20:51,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-15 01:20:51,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:51,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:51,403 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:51,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-15 01:20:51,607 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-15 01:20:51,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:51,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114632882] [2020-09-15 01:20:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:51,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114632882] [2020-09-15 01:20:51,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96695104] [2020-09-15 01:20:51,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:51,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:20:51,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:51,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:51,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:51,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:51,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543541359] [2020-09-15 01:20:51,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:51,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:51,957 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-15 01:20:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:52,899 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-15 01:20:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:20:52,900 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:52,900 INFO L225 Difference]: With dead ends: 111 [2020-09-15 01:20:52,900 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:20:52,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:20:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:20:52,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-15 01:20:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:20:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-15 01:20:52,903 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-15 01:20:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:52,903 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-15 01:20:52,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:52,903 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-15 01:20:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:52,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:52,904 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:53,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:53,105 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-15 01:20:53,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:53,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817620375] [2020-09-15 01:20:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:53,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817620375] [2020-09-15 01:20:53,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783033550] [2020-09-15 01:20:53,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:53,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:20:53,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:53,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:53,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:53,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:53,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:53,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141447873] [2020-09-15 01:20:53,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:53,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:53,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:53,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:53,474 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-15 01:20:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:54,634 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-15 01:20:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:20:54,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:54,635 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:20:54,635 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:20:54,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:20:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:20:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-15 01:20:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:20:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-15 01:20:54,637 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-15 01:20:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:54,638 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-15 01:20:54,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-15 01:20:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:54,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:54,638 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:54,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-15 01:20:54,839 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:54,840 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-15 01:20:54,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:54,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901857353] [2020-09-15 01:20:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:55,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901857353] [2020-09-15 01:20:55,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746658937] [2020-09-15 01:20:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:55,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:55,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:55,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 01:20:55,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220143348] [2020-09-15 01:20:55,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:20:55,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:55,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:20:55,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:20:55,178 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-15 01:20:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:56,159 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-15 01:20:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:20:56,161 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-15 01:20:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:56,162 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:20:56,162 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:20:56,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:20:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:20:56,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-15 01:20:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:20:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-15 01:20:56,164 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-15 01:20:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:56,165 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-15 01:20:56,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:20:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-15 01:20:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 01:20:56,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:56,165 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:56,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:56,372 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:56,373 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-15 01:20:56,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:56,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480152440] [2020-09-15 01:20:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:56,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480152440] [2020-09-15 01:20:56,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087554439] [2020-09-15 01:20:56,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:56,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:20:56,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:56,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 01:20:56,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:56,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:56,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:56,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 01:20:56,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871099379] [2020-09-15 01:20:56,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:56,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:56,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:56,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:56,737 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-15 01:20:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:57,919 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-15 01:20:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:20:57,920 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 01:20:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:57,920 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:20:57,921 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:20:57,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:20:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:20:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-15 01:20:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:20:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-15 01:20:57,923 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-15 01:20:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:57,923 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-15 01:20:57,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-15 01:20:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:20:57,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:57,924 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:58,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:58,125 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-15 01:20:58,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:58,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319125281] [2020-09-15 01:20:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:58,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319125281] [2020-09-15 01:20:58,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172855693] [2020-09-15 01:20:58,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:58,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:20:58,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:20:58,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:58,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:58,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:20:58,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149986122] [2020-09-15 01:20:58,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:20:58,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:58,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:20:58,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:20:58,562 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-15 01:20:59,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:20:59,132 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-15 01:20:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:20:59,133 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:20:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:20:59,134 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:20:59,134 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:20:59,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:20:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:20:59,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-15 01:20:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:20:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:20:59,136 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:20:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:20:59,136 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:20:59,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:20:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:20:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:20:59,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:20:59,137 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:20:59,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:20:59,344 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:20:59,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:20:59,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-15 01:20:59,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:20:59,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310255152] [2020-09-15 01:20:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:20:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:20:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:59,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310255152] [2020-09-15 01:20:59,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934751293] [2020-09-15 01:20:59,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:20:59,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:20:59,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:20:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:20:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:20:59,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:20:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:20:59,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:20:59,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:20:59,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198862657] [2020-09-15 01:20:59,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:20:59,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:20:59,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:20:59,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:20:59,804 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:00,466 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-15 01:21:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:21:00,467 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:00,467 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:21:00,467 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:21:00,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:21:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:21:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-15 01:21:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:00,470 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:00,470 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:00,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:00,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:00,471 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:00,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:00,671 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:00,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-15 01:21:00,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:00,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669939681] [2020-09-15 01:21:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:01,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669939681] [2020-09-15 01:21:01,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227633594] [2020-09-15 01:21:01,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:01,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:21:01,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:01,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:01,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:01,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:01,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:01,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864370782] [2020-09-15 01:21:01,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:01,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:01,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:01,089 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:01,721 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-15 01:21:01,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:21:01,722 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:01,722 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:21:01,723 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:21:01,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:21:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:21:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-15 01:21:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:01,725 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:01,725 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:01,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:01,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:01,726 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:01,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:01,927 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:01,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:01,928 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-15 01:21:01,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:01,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721457239] [2020-09-15 01:21:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:02,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721457239] [2020-09-15 01:21:02,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006311207] [2020-09-15 01:21:02,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:02,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:21:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:02,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:02,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:02,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:02,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035350438] [2020-09-15 01:21:02,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:02,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:02,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:02,385 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:03,173 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-15 01:21:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:21:03,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:03,175 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:21:03,175 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:21:03,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:21:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:21:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-15 01:21:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:03,178 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:03,178 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:03,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:03,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:03,179 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:03,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-15 01:21:03,380 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-15 01:21:03,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:03,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071410248] [2020-09-15 01:21:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:03,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071410248] [2020-09-15 01:21:03,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361748370] [2020-09-15 01:21:03,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:03,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:03,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:03,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:03,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101150984] [2020-09-15 01:21:03,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:03,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:03,782 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:04,492 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-15 01:21:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:21:04,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:04,494 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:21:04,494 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:21:04,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:21:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:21:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-15 01:21:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:04,497 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:04,497 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:04,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:04,497 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:04,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:04,498 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:04,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-15 01:21:04,701 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-15 01:21:04,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:04,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105519142] [2020-09-15 01:21:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:05,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105519142] [2020-09-15 01:21:05,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500454153] [2020-09-15 01:21:05,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:05,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:05,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:05,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:05,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:05,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:05,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:05,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:05,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284933815] [2020-09-15 01:21:05,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:05,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:05,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:05,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:05,128 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:06,041 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-15 01:21:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:21:06,042 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:06,043 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:21:06,043 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:21:06,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:21:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:21:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-15 01:21:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:06,046 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:06,046 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:06,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:06,046 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:06,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:06,047 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:06,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-15 01:21:06,256 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-15 01:21:06,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:06,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140396606] [2020-09-15 01:21:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:06,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140396606] [2020-09-15 01:21:06,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144180287] [2020-09-15 01:21:06,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:06,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:21:06,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:06,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:06,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:06,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:06,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:06,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389489033] [2020-09-15 01:21:06,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:06,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:06,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:06,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:06,650 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:07,438 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-15 01:21:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:21:07,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:07,445 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:21:07,445 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:21:07,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:21:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:21:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-15 01:21:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:07,447 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:07,447 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:07,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:07,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:07,448 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:07,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-15 01:21:07,649 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-15 01:21:07,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:07,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931799577] [2020-09-15 01:21:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:07,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931799577] [2020-09-15 01:21:07,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194877790] [2020-09-15 01:21:07,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:08,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:08,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:08,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:08,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:08,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:08,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:08,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:08,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835224976] [2020-09-15 01:21:08,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:08,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:08,067 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:09,084 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-15 01:21:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:21:09,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:09,085 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:21:09,085 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:21:09,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:21:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:21:09,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-15 01:21:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:09,088 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:09,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:09,088 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:09,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:09,088 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:09,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:09,089 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:09,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:09,290 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:09,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:09,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-15 01:21:09,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:09,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196935484] [2020-09-15 01:21:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:09,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196935484] [2020-09-15 01:21:09,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064581713] [2020-09-15 01:21:09,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:09,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:21:09,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:09,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:09,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:09,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:09,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:09,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951856530] [2020-09-15 01:21:09,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:09,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:09,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:09,672 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:10,551 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-15 01:21:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:21:10,552 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:10,553 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:21:10,553 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:21:10,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:21:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:21:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-15 01:21:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:10,555 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:10,555 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:10,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:10,555 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:10,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:10,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:10,555 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:10,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-15 01:21:10,756 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-15 01:21:10,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:10,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97732700] [2020-09-15 01:21:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:11,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97732700] [2020-09-15 01:21:11,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874995037] [2020-09-15 01:21:11,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:11,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:21:11,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:11,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:11,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:11,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:11,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:11,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025172732] [2020-09-15 01:21:11,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:11,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:11,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:11,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:11,139 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:12,274 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-15 01:21:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:21:12,275 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:12,276 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:21:12,276 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 01:21:12,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:21:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 01:21:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-15 01:21:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:12,279 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:12,279 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:12,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:12,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:12,279 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:12,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:12,480 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-15 01:21:12,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:12,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68412163] [2020-09-15 01:21:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:12,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68412163] [2020-09-15 01:21:12,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212376187] [2020-09-15 01:21:12,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:12,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:12,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:12,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:12,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975003257] [2020-09-15 01:21:12,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:12,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:12,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:12,859 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:13,803 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-15 01:21:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:21:13,804 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:13,805 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:21:13,805 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:21:13,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:21:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:21:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-15 01:21:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:13,810 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:13,810 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:13,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:13,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:13,811 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:14,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:14,019 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:14,020 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-15 01:21:14,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:14,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674057724] [2020-09-15 01:21:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:14,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674057724] [2020-09-15 01:21:14,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18993818] [2020-09-15 01:21:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:14,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:14,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:14,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:14,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:14,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:14,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:14,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880629541] [2020-09-15 01:21:14,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:14,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:14,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:14,415 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:15,643 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-15 01:21:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:21:15,644 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:15,644 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:21:15,644 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 01:21:15,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:21:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 01:21:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-15 01:21:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:15,647 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:15,648 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:15,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:15,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:15,648 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:15,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-15 01:21:15,850 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-15 01:21:15,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:15,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988663744] [2020-09-15 01:21:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:16,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988663744] [2020-09-15 01:21:16,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527749661] [2020-09-15 01:21:16,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:16,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 01:21:16,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:16,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:16,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:16,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:16,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:16,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220746803] [2020-09-15 01:21:16,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:16,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:16,232 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:17,263 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-15 01:21:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:21:17,264 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:17,265 INFO L225 Difference]: With dead ends: 98 [2020-09-15 01:21:17,265 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:21:17,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:21:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:21:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-15 01:21:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:17,268 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-15 01:21:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:17,268 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:17,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:17,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:17,268 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:17,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:17,469 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-15 01:21:17,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:17,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171001784] [2020-09-15 01:21:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:17,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171001784] [2020-09-15 01:21:17,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225112585] [2020-09-15 01:21:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:17,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:17,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:17,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:17,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:17,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:17,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:17,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768107859] [2020-09-15 01:21:17,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:17,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:17,878 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-15 01:21:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:19,244 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-15 01:21:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:21:19,245 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:19,246 INFO L225 Difference]: With dead ends: 97 [2020-09-15 01:21:19,246 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:21:19,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:21:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:21:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-15 01:21:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:19,248 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-15 01:21:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:19,248 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:19,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:19,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:19,249 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:19,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-15 01:21:19,449 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-15 01:21:19,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:19,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665068626] [2020-09-15 01:21:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:19,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665068626] [2020-09-15 01:21:19,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926718907] [2020-09-15 01:21:19,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:19,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 01:21:19,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:19,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:19,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:19,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:19,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 01:21:19,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209392221] [2020-09-15 01:21:19,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:21:19,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:19,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:21:19,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:21:19,823 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-15 01:21:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:20,924 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-15 01:21:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:21:20,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-15 01:21:20,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:20,925 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:21:20,925 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:21:20,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:21:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:21:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-15 01:21:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:21:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-15 01:21:20,927 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-15 01:21:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:20,928 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-15 01:21:20,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:21:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-15 01:21:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:20,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:20,928 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:21,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-15 01:21:21,129 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-15 01:21:21,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:21,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990121599] [2020-09-15 01:21:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:21,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990121599] [2020-09-15 01:21:21,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444686976] [2020-09-15 01:21:21,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:21,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 01:21:21,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:21,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:21,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:21,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:21,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584095251] [2020-09-15 01:21:21,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:21,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:21,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:21,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:21,549 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-15 01:21:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:22,741 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-09-15 01:21:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:21:22,742 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:22,743 INFO L225 Difference]: With dead ends: 92 [2020-09-15 01:21:22,743 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 01:21:22,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:21:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 01:21:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-09-15 01:21:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 01:21:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-15 01:21:22,745 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-15 01:21:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:22,745 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-15 01:21:22,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-15 01:21:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 01:21:22,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:22,745 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:22,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-15 01:21:22,946 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-15 01:21:22,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:22,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437450143] [2020-09-15 01:21:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:23,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437450143] [2020-09-15 01:21:23,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638132183] [2020-09-15 01:21:23,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:23,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 01:21:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:23,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:21:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:23,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:23,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-15 01:21:23,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453787390] [2020-09-15 01:21:23,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:23,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:23,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:23,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:23,349 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-15 01:21:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:24,636 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-15 01:21:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:21:24,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 01:21:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:24,638 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:21:24,638 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:21:24,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:21:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:21:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-15 01:21:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:21:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-15 01:21:24,641 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-15 01:21:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:24,641 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-15 01:21:24,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-15 01:21:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:24,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:24,641 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:24,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-15 01:21:24,842 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:24,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-15 01:21:24,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:24,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973597117] [2020-09-15 01:21:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:25,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973597117] [2020-09-15 01:21:25,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142886626] [2020-09-15 01:21:25,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:25,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:25,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:25,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:25,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:21:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:25,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:25,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:25,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555404761] [2020-09-15 01:21:25,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:25,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:25,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:25,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:25,279 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-15 01:21:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:26,654 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-15 01:21:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:21:26,655 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:26,656 INFO L225 Difference]: With dead ends: 90 [2020-09-15 01:21:26,656 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:21:26,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:21:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:21:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-15 01:21:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 01:21:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-15 01:21:26,658 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-15 01:21:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:26,658 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-15 01:21:26,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-15 01:21:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:26,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:26,659 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:26,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:26,860 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:26,860 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-15 01:21:26,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:26,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339164983] [2020-09-15 01:21:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:27,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339164983] [2020-09-15 01:21:27,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747623160] [2020-09-15 01:21:27,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:27,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:21:27,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:27,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:27,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:27,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:27,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2284689] [2020-09-15 01:21:27,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:27,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:27,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:27,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:27,332 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-15 01:21:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:27,867 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-15 01:21:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:21:27,868 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:27,868 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:21:27,869 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 01:21:27,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:21:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 01:21:27,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-15 01:21:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:21:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-15 01:21:27,871 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-15 01:21:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:27,871 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-15 01:21:27,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-15 01:21:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:27,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:27,872 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:28,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:28,073 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:28,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:28,073 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-15 01:21:28,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:28,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589464203] [2020-09-15 01:21:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:28,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589464203] [2020-09-15 01:21:28,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014204151] [2020-09-15 01:21:28,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:28,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:28,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:28,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:28,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:28,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:28,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:28,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:28,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776643183] [2020-09-15 01:21:28,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:28,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:28,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:28,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:28,567 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-15 01:21:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:29,233 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-15 01:21:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:21:29,234 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:29,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:29,235 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:21:29,235 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:21:29,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:21:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:21:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-15 01:21:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 01:21:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-15 01:21:29,238 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-15 01:21:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:29,238 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-15 01:21:29,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-15 01:21:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:29,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:29,239 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:29,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:29,446 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:29,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-15 01:21:29,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:29,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051810383] [2020-09-15 01:21:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:29,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051810383] [2020-09-15 01:21:29,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099590225] [2020-09-15 01:21:29,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:29,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:21:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:29,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:29,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:29,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:29,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:29,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352395834] [2020-09-15 01:21:29,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:29,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:29,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:29,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:29,899 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-15 01:21:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:30,605 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-15 01:21:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:21:30,606 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:30,607 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:21:30,607 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:21:30,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:21:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:21:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-15 01:21:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:21:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-15 01:21:30,609 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-15 01:21:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:30,609 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-15 01:21:30,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-15 01:21:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:30,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:30,610 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:30,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:30,811 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:30,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-15 01:21:30,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:30,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856913172] [2020-09-15 01:21:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:31,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856913172] [2020-09-15 01:21:31,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429359797] [2020-09-15 01:21:31,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:31,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:21:31,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:31,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:31,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:31,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:31,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:31,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:31,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195418601] [2020-09-15 01:21:31,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:31,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:31,334 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-15 01:21:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:32,112 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-15 01:21:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:21:32,113 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:32,114 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:21:32,114 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:21:32,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:21:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:21:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-15 01:21:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:21:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-15 01:21:32,117 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-15 01:21:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:32,117 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-15 01:21:32,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-15 01:21:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:32,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:32,122 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:32,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:32,323 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:32,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-15 01:21:32,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:32,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659361741] [2020-09-15 01:21:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:32,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659361741] [2020-09-15 01:21:32,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495818141] [2020-09-15 01:21:32,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:32,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:32,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:32,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322920101] [2020-09-15 01:21:32,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:32,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:32,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:32,765 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-15 01:21:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:33,522 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-15 01:21:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:21:33,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:33,523 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:21:33,523 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:21:33,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:21:33,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:21:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-15 01:21:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:21:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-15 01:21:33,526 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-15 01:21:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:33,526 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-15 01:21:33,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-15 01:21:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:33,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:33,527 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:33,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:33,727 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:33,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-15 01:21:33,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:33,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859601707] [2020-09-15 01:21:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:34,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859601707] [2020-09-15 01:21:34,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307579748] [2020-09-15 01:21:34,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:34,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:34,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:34,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:34,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:34,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569140010] [2020-09-15 01:21:34,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:34,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:34,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:34,211 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-15 01:21:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:35,062 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-15 01:21:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:21:35,063 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:35,064 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:21:35,064 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:21:35,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:21:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:21:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-15 01:21:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:21:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-15 01:21:35,068 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-15 01:21:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:35,068 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-15 01:21:35,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-15 01:21:35,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:35,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:35,069 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:35,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:35,271 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:35,272 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-15 01:21:35,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:35,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736156332] [2020-09-15 01:21:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:35,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736156332] [2020-09-15 01:21:35,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682786094] [2020-09-15 01:21:35,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:35,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:21:35,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:35,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:35,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:35,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:35,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448985236] [2020-09-15 01:21:35,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:35,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:35,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:35,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:35,701 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-15 01:21:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:36,591 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-15 01:21:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:21:36,592 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:36,593 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:21:36,593 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:21:36,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:21:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:21:36,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-15 01:21:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:21:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-15 01:21:36,595 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-15 01:21:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:36,595 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-15 01:21:36,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:36,596 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-15 01:21:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:36,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:36,596 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:36,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-15 01:21:36,803 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-15 01:21:36,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:36,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644303649] [2020-09-15 01:21:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:37,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644303649] [2020-09-15 01:21:37,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114832900] [2020-09-15 01:21:37,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:37,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:37,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:37,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:37,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:37,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:37,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110253114] [2020-09-15 01:21:37,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:37,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:37,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:37,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:37,263 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-15 01:21:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:38,283 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-15 01:21:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:21:38,284 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:38,285 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:21:38,285 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:21:38,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:21:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:21:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-15 01:21:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:21:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-15 01:21:38,288 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-15 01:21:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:38,288 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-15 01:21:38,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-15 01:21:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:38,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:38,288 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:38,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-15 01:21:38,489 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:38,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-15 01:21:38,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:38,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310262122] [2020-09-15 01:21:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:38,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310262122] [2020-09-15 01:21:38,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919986125] [2020-09-15 01:21:38,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:38,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:21:38,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:38,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:38,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:38,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:38,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:38,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730822244] [2020-09-15 01:21:38,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:38,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:38,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:38,886 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-15 01:21:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:39,783 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-15 01:21:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:21:39,784 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:39,785 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:21:39,785 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:21:39,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:21:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:21:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-15 01:21:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:21:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-15 01:21:39,787 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-15 01:21:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:39,787 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-15 01:21:39,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-15 01:21:39,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:39,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:39,788 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:39,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-15 01:21:39,989 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:39,989 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-15 01:21:39,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:39,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095800702] [2020-09-15 01:21:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:40,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095800702] [2020-09-15 01:21:40,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641755442] [2020-09-15 01:21:40,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:40,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:21:40,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:40,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:40,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:40,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:40,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:40,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:40,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739185800] [2020-09-15 01:21:40,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:40,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:40,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:40,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:40,454 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-15 01:21:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:41,587 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-15 01:21:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:21:41,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:41,588 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:21:41,588 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:21:41,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:21:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:21:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-15 01:21:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:21:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-15 01:21:41,590 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-15 01:21:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:41,590 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-15 01:21:41,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:41,590 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-15 01:21:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:41,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:41,591 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:41,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-15 01:21:41,792 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-15 01:21:41,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:41,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096876432] [2020-09-15 01:21:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:42,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096876432] [2020-09-15 01:21:42,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772128027] [2020-09-15 01:21:42,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:42,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:42,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:42,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109555924] [2020-09-15 01:21:42,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:42,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:42,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:42,209 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-15 01:21:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:43,217 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-15 01:21:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:21:43,218 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:43,218 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:21:43,219 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:21:43,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:21:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:21:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-15 01:21:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:21:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-15 01:21:43,226 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-15 01:21:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:43,226 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-15 01:21:43,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-15 01:21:43,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:43,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:43,227 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:43,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:43,428 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:43,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-15 01:21:43,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:43,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107720979] [2020-09-15 01:21:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:43,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107720979] [2020-09-15 01:21:43,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954500046] [2020-09-15 01:21:43,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:43,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:43,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:43,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:43,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:43,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:43,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:43,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:43,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098180708] [2020-09-15 01:21:43,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:43,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:43,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:43,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:43,858 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-15 01:21:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:45,084 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-15 01:21:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:21:45,085 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:45,086 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:21:45,086 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:21:45,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:21:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:21:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-15 01:21:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:21:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-15 01:21:45,088 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-15 01:21:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:45,089 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-15 01:21:45,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-15 01:21:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:45,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:45,089 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:45,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:45,290 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-15 01:21:45,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:45,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603394002] [2020-09-15 01:21:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:45,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603394002] [2020-09-15 01:21:45,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117711478] [2020-09-15 01:21:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:45,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:21:45,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:45,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:45,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:45,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:45,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:45,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661603623] [2020-09-15 01:21:45,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:45,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:45,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:45,701 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-15 01:21:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:46,795 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-15 01:21:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:21:46,796 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:46,796 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:21:46,797 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:21:46,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:21:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:21:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-15 01:21:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:21:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-15 01:21:46,800 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-15 01:21:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:46,800 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-15 01:21:46,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-15 01:21:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:46,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:46,800 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:47,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-15 01:21:47,001 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:47,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-15 01:21:47,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:47,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667482226] [2020-09-15 01:21:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:47,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667482226] [2020-09-15 01:21:47,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068440416] [2020-09-15 01:21:47,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:47,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:47,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:47,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:47,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:47,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:47,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:47,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:47,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526562299] [2020-09-15 01:21:47,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:47,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:47,434 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-15 01:21:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:48,787 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-15 01:21:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:21:48,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:48,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:48,789 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:21:48,789 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:21:48,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:21:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:21:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-15 01:21:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:21:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-15 01:21:48,792 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-15 01:21:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:48,792 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-15 01:21:48,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-15 01:21:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:48,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:48,792 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:48,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:48,993 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:48,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-15 01:21:48,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:48,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28769674] [2020-09-15 01:21:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:49,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28769674] [2020-09-15 01:21:49,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189846311] [2020-09-15 01:21:49,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:49,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:21:49,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:49,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:49,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:49,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:49,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973491028] [2020-09-15 01:21:49,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:49,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:49,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:49,394 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-15 01:21:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:50,551 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-15 01:21:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:21:50,552 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:50,552 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:21:50,553 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:21:50,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:21:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:21:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-15 01:21:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:21:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-15 01:21:50,559 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-15 01:21:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:50,559 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-15 01:21:50,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-15 01:21:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:50,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:50,560 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:50,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:50,769 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:50,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-15 01:21:50,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:50,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201552627] [2020-09-15 01:21:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:51,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201552627] [2020-09-15 01:21:51,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129788896] [2020-09-15 01:21:51,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:51,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:21:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:51,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:51,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:51,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:51,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:51,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130605419] [2020-09-15 01:21:51,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:51,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:51,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:51,210 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-15 01:21:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:52,640 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-15 01:21:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:21:52,641 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:52,642 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:21:52,642 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:21:52,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:21:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:21:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-15 01:21:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:21:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-15 01:21:52,646 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-15 01:21:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:52,646 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-15 01:21:52,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-15 01:21:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:52,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:52,647 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:52,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:52,855 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:52,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-15 01:21:52,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:52,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239325678] [2020-09-15 01:21:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:53,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239325678] [2020-09-15 01:21:53,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304345043] [2020-09-15 01:21:53,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:53,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:53,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:53,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 01:21:53,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98736289] [2020-09-15 01:21:53,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 01:21:53,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:53,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 01:21:53,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:21:53,256 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-15 01:21:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:54,495 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-15 01:21:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:21:54,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-15 01:21:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:54,497 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:21:54,498 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:21:54,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:21:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:21:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-15 01:21:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:21:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-15 01:21:54,501 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-15 01:21:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:54,501 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-15 01:21:54,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 01:21:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-15 01:21:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 01:21:54,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:54,502 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:54,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:54,711 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-15 01:21:54,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:54,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162021136] [2020-09-15 01:21:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:55,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162021136] [2020-09-15 01:21:55,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667356960] [2020-09-15 01:21:55,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:55,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:21:55,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 01:21:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:55,118 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:55,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:55,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 01:21:55,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467535091] [2020-09-15 01:21:55,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:55,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:55,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:55,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:55,139 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-15 01:21:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:56,654 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-15 01:21:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:21:56,655 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 01:21:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:56,656 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:21:56,656 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:21:56,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:21:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:21:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-15 01:21:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:21:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-15 01:21:56,658 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-15 01:21:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:56,658 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-15 01:21:56,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-15 01:21:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:21:56,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:56,659 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:56,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:21:56,860 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-15 01:21:56,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:56,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333532352] [2020-09-15 01:21:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:57,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333532352] [2020-09-15 01:21:57,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845503423] [2020-09-15 01:21:57,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:57,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:21:57,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:57,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:21:57,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:57,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:57,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:21:57,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350371845] [2020-09-15 01:21:57,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:21:57,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:57,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:21:57,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:21:57,383 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-15 01:21:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:58,057 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-15 01:21:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:21:58,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:21:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:58,059 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:21:58,059 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:21:58,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:21:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:21:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-15 01:21:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:21:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:21:58,062 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:21:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:58,062 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:21:58,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:21:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:21:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:21:58,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:58,063 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:58,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-15 01:21:58,264 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-15 01:21:58,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:58,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687519261] [2020-09-15 01:21:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:21:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:58,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687519261] [2020-09-15 01:21:58,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713080425] [2020-09-15 01:21:58,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:21:58,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:21:58,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:21:58,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:21:58,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:21:58,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:21:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:21:58,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:21:58,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:21:58,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218758168] [2020-09-15 01:21:58,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:21:58,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:21:58,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:21:58,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:21:58,818 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:21:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:21:59,579 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-15 01:21:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:21:59,581 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:21:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:21:59,581 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:21:59,581 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:21:59,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:21:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:21:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-15 01:21:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:21:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:21:59,583 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:21:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:21:59,583 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:21:59,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:21:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:21:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:21:59,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:21:59,584 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:21:59,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-15 01:21:59,785 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:21:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:21:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-15 01:21:59,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:21:59,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228146295] [2020-09-15 01:21:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:21:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:00,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228146295] [2020-09-15 01:22:00,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307508751] [2020-09-15 01:22:00,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:00,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:22:00,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:00,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:00,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:00,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:00,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45386464] [2020-09-15 01:22:00,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:00,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:00,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:00,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:00,292 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:01,080 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-15 01:22:01,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:22:01,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:01,082 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:22:01,082 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:22:01,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:22:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:22:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-15 01:22:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:01,085 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:01,086 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:01,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:01,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:01,087 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:01,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:01,287 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-15 01:22:01,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:01,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878706400] [2020-09-15 01:22:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:01,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878706400] [2020-09-15 01:22:01,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399759885] [2020-09-15 01:22:01,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:01,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:22:01,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:01,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:01,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:01,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:01,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:01,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921114572] [2020-09-15 01:22:01,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:01,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:01,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:01,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:01,827 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:02,796 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-15 01:22:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:22:02,797 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:02,798 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:22:02,798 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:22:02,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:22:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:22:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-15 01:22:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:02,801 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:02,802 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:02,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:02,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:02,802 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:03,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-15 01:22:03,003 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:03,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:03,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-15 01:22:03,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:03,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715716874] [2020-09-15 01:22:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:03,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715716874] [2020-09-15 01:22:03,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723809481] [2020-09-15 01:22:03,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:03,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:03,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:03,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:03,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:03,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149203836] [2020-09-15 01:22:03,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:03,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:03,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:03,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:03,492 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:04,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:04,368 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-15 01:22:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:22:04,369 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:04,370 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:22:04,370 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:22:04,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:22:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:22:04,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-15 01:22:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:04,373 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:04,373 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:04,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:04,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:04,374 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:04,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:04,575 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-15 01:22:04,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:04,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84221816] [2020-09-15 01:22:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:04,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84221816] [2020-09-15 01:22:04,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159726947] [2020-09-15 01:22:04,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:05,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:05,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:05,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:05,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:05,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:05,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:05,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:05,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321204052] [2020-09-15 01:22:05,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:05,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:05,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:05,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:05,095 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:06,176 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-15 01:22:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:22:06,177 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:06,178 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:22:06,178 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:22:06,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:22:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:22:06,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-15 01:22:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:06,181 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:06,181 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:06,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:06,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:06,182 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:06,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:06,390 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-15 01:22:06,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:06,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615435914] [2020-09-15 01:22:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:06,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615435914] [2020-09-15 01:22:06,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330881526] [2020-09-15 01:22:06,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:06,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:22:06,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:06,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:06,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:06,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165951705] [2020-09-15 01:22:06,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:06,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:06,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:06,873 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:07,826 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-15 01:22:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:22:07,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:07,828 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:22:07,828 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:22:07,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:22:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:22:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-15 01:22:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:07,831 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:07,831 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:07,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:07,831 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:07,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:07,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:07,831 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:08,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:08,032 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-15 01:22:08,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:08,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549695225] [2020-09-15 01:22:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:08,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549695225] [2020-09-15 01:22:08,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140396214] [2020-09-15 01:22:08,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:08,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:08,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:08,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:08,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:08,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:08,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:08,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387587642] [2020-09-15 01:22:08,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:08,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:08,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:08,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:08,534 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:09,737 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-15 01:22:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:22:09,738 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:09,739 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:22:09,739 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:22:09,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:22:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:22:09,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-15 01:22:09,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:09,742 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:09,742 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:09,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:09,742 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:09,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:09,743 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:09,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:09,944 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-15 01:22:09,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:09,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278533659] [2020-09-15 01:22:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:10,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278533659] [2020-09-15 01:22:10,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818492830] [2020-09-15 01:22:10,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:10,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:22:10,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:10,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:10,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:10,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:10,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:10,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2736081] [2020-09-15 01:22:10,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:10,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:10,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:10,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:10,400 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:11,439 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-15 01:22:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:22:11,440 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:11,440 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:22:11,441 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:22:11,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:22:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:22:11,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-15 01:22:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:11,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:11,443 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:11,443 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:11,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:11,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:11,444 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:11,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-15 01:22:11,645 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-15 01:22:11,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:11,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922982008] [2020-09-15 01:22:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:12,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922982008] [2020-09-15 01:22:12,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705392077] [2020-09-15 01:22:12,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:12,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:22:12,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:12,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:12,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:12,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:12,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:12,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:12,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790434977] [2020-09-15 01:22:12,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:12,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:12,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:12,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:12,145 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:13,455 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-15 01:22:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:22:13,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:13,457 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:22:13,457 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:22:13,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:22:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:22:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-15 01:22:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:13,461 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:13,461 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:13,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:13,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:13,461 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:13,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:13,669 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:13,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-15 01:22:13,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:13,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246261031] [2020-09-15 01:22:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:14,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246261031] [2020-09-15 01:22:14,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233654301] [2020-09-15 01:22:14,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:14,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:14,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:14,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:14,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:14,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810330256] [2020-09-15 01:22:14,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:14,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:14,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:14,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:14,114 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:15,259 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-15 01:22:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:22:15,260 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:15,261 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:22:15,261 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 01:22:15,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:22:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 01:22:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-15 01:22:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:15,264 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:15,264 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:15,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:15,265 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:15,265 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:15,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-15 01:22:15,466 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-15 01:22:15,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:15,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236068632] [2020-09-15 01:22:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:15,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236068632] [2020-09-15 01:22:15,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650755927] [2020-09-15 01:22:15,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:15,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:15,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:15,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:15,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:15,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:15,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:15,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979843340] [2020-09-15 01:22:15,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:15,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:15,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:15,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:15,947 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:17,397 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-15 01:22:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:22:17,398 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:17,399 INFO L225 Difference]: With dead ends: 111 [2020-09-15 01:22:17,399 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:22:17,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:22:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:22:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-15 01:22:17,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:17,401 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:17,401 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:17,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:17,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:17,402 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:17,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-15 01:22:17,603 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:17,603 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-15 01:22:17,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:17,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775898656] [2020-09-15 01:22:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:17,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775898656] [2020-09-15 01:22:17,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757965837] [2020-09-15 01:22:17,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:18,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:22:18,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:18,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:18,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:18,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:18,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598537705] [2020-09-15 01:22:18,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:18,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:18,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:18,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:18,046 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:19,265 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-15 01:22:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:22:19,266 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:19,267 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:22:19,267 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:22:19,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:22:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:22:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-15 01:22:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:19,270 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:19,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:19,270 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:19,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:19,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:19,271 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:19,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:19,474 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-15 01:22:19,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:19,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578014418] [2020-09-15 01:22:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:19,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578014418] [2020-09-15 01:22:19,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261093256] [2020-09-15 01:22:19,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:19,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:19,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:19,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:19,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:19,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:19,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:19,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271903818] [2020-09-15 01:22:19,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:19,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:19,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:19,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:19,953 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:21,539 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-15 01:22:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:22:21,540 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:21,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:21,541 INFO L225 Difference]: With dead ends: 107 [2020-09-15 01:22:21,541 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 01:22:21,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:22:21,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 01:22:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-15 01:22:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:21,544 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:21,544 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:21,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:21,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:21,545 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:21,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:21,752 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-15 01:22:21,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:21,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554605948] [2020-09-15 01:22:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:22,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554605948] [2020-09-15 01:22:22,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130802145] [2020-09-15 01:22:22,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:22,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 01:22:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:22,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:22,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:22,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562247880] [2020-09-15 01:22:22,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:22,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:22,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:22,201 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:23,497 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-15 01:22:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:22:23,498 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:23,499 INFO L225 Difference]: With dead ends: 104 [2020-09-15 01:22:23,499 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:22:23,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:22:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:22:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-15 01:22:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:22:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:22:23,502 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-15 01:22:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:23,502 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:22:23,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:22:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:23,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:23,502 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:23,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:23,703 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:23,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-15 01:22:23,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:23,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077857260] [2020-09-15 01:22:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:24,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077857260] [2020-09-15 01:22:24,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689795275] [2020-09-15 01:22:24,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:24,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 01:22:24,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:24,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:24,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:24,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:24,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:24,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:24,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914267995] [2020-09-15 01:22:24,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:24,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:24,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:24,201 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-15 01:22:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:25,944 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-15 01:22:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:22:25,945 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:25,946 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:22:25,946 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:22:25,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:22:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:22:25,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-15 01:22:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:22:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:22:25,949 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-15 01:22:25,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:25,949 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:22:25,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:22:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:25,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:25,950 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:26,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-15 01:22:26,156 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:26,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-15 01:22:26,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:26,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378549541] [2020-09-15 01:22:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:26,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378549541] [2020-09-15 01:22:26,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330791695] [2020-09-15 01:22:26,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:26,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:26,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:26,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 01:22:26,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139584980] [2020-09-15 01:22:26,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 01:22:26,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:26,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 01:22:26,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:22:26,594 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-15 01:22:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:27,977 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-15 01:22:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:22:27,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-15 01:22:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:27,979 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:22:27,979 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:22:27,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:22:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:22:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-15 01:22:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 01:22:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-15 01:22:27,981 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-15 01:22:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:27,981 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-15 01:22:27,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 01:22:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-15 01:22:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:27,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:27,982 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:28,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:28,183 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:28,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-15 01:22:28,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:28,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11005923] [2020-09-15 01:22:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:28,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11005923] [2020-09-15 01:22:28,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754539699] [2020-09-15 01:22:28,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:28,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:28,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:28,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:28,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:28,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:28,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:28,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:28,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128567941] [2020-09-15 01:22:28,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:28,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:28,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:28,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:28,652 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-15 01:22:30,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:30,334 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-15 01:22:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:22:30,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:30,335 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:22:30,336 INFO L226 Difference]: Without dead ends: 92 [2020-09-15 01:22:30,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:22:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-15 01:22:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-15 01:22:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 01:22:30,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-15 01:22:30,338 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-15 01:22:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:30,339 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-15 01:22:30,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-15 01:22:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 01:22:30,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:30,339 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:30,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:30,544 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:30,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-15 01:22:30,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:30,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246372703] [2020-09-15 01:22:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:30,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246372703] [2020-09-15 01:22:30,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757215025] [2020-09-15 01:22:30,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:30,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 01:22:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 01:22:30,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:30,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:22:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:31,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:31,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-15 01:22:31,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441471334] [2020-09-15 01:22:31,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:31,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:31,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:31,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:31,023 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-15 01:22:32,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:32,671 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-15 01:22:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:22:32,672 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 01:22:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:32,672 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:22:32,672 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:22:32,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:22:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:22:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-15 01:22:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:22:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-15 01:22:32,675 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-15 01:22:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:32,675 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-15 01:22:32,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-15 01:22:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:32,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:32,676 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:32,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:32,877 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:32,878 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-15 01:22:32,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:32,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650787281] [2020-09-15 01:22:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:33,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650787281] [2020-09-15 01:22:33,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704951946] [2020-09-15 01:22:33,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:33,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:33,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:33,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:33,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:22:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:33,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:33,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:33,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223264690] [2020-09-15 01:22:33,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:33,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:33,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:33,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:33,407 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-15 01:22:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:35,132 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-15 01:22:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:22:35,133 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:35,133 INFO L225 Difference]: With dead ends: 96 [2020-09-15 01:22:35,133 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:22:35,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:22:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:22:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-15 01:22:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:22:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-15 01:22:35,136 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-15 01:22:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:35,136 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-15 01:22:35,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-15 01:22:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:35,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:35,137 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:35,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:35,337 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:35,338 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-15 01:22:35,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:35,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991684503] [2020-09-15 01:22:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:35,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991684503] [2020-09-15 01:22:35,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498067145] [2020-09-15 01:22:35,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:35,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:22:35,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:35,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:35,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:35,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:35,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030905543] [2020-09-15 01:22:35,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:35,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:35,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:35,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:35,904 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-15 01:22:36,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:36,648 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-15 01:22:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:22:36,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:36,650 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:22:36,650 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:22:36,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:22:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:22:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-15 01:22:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:22:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-15 01:22:36,653 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-15 01:22:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:36,653 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-15 01:22:36,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-15 01:22:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:36,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:36,653 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:36,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-15 01:22:36,855 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:36,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-15 01:22:36,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:36,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291799361] [2020-09-15 01:22:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:37,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291799361] [2020-09-15 01:22:37,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20737141] [2020-09-15 01:22:37,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:37,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:22:37,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:37,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:37,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:37,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:37,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941225233] [2020-09-15 01:22:37,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:37,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:37,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:37,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:37,458 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-15 01:22:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:38,294 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-15 01:22:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:22:38,295 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:38,296 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:22:38,296 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:22:38,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:22:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:22:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-15 01:22:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 01:22:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-15 01:22:38,299 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-15 01:22:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:38,299 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-15 01:22:38,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-15 01:22:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:38,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:38,300 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:38,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-15 01:22:38,509 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-15 01:22:38,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:38,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292173011] [2020-09-15 01:22:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:38,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292173011] [2020-09-15 01:22:38,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106252106] [2020-09-15 01:22:38,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:39,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:39,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:39,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:39,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323489772] [2020-09-15 01:22:39,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:39,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:39,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:39,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:39,054 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-15 01:22:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:39,951 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-15 01:22:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:22:39,952 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:39,953 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:22:39,953 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:22:39,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:22:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:22:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-15 01:22:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 01:22:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-15 01:22:39,955 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-15 01:22:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:39,956 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-15 01:22:39,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-15 01:22:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:39,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:39,956 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:40,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-15 01:22:40,157 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:40,158 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-15 01:22:40,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:40,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813021869] [2020-09-15 01:22:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:40,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813021869] [2020-09-15 01:22:40,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428907370] [2020-09-15 01:22:40,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:40,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:40,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:40,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:40,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:40,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:40,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:40,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:40,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307320526] [2020-09-15 01:22:40,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:40,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:40,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:40,748 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-15 01:22:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:41,671 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-15 01:22:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:22:41,673 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:41,673 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:22:41,673 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:22:41,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:22:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:22:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-15 01:22:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:22:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-15 01:22:41,677 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-15 01:22:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:41,677 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-15 01:22:41,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-15 01:22:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:41,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:41,678 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:41,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-15 01:22:41,886 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-15 01:22:41,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:41,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500967936] [2020-09-15 01:22:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:42,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500967936] [2020-09-15 01:22:42,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231553493] [2020-09-15 01:22:42,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:42,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:22:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:42,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:42,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:42,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:42,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065492872] [2020-09-15 01:22:42,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:42,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:42,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:42,430 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-15 01:22:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:43,369 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-15 01:22:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:22:43,370 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:43,371 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:22:43,371 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:22:43,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:22:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:22:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-15 01:22:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:22:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-15 01:22:43,373 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-15 01:22:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:43,373 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-15 01:22:43,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-15 01:22:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:43,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:43,373 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:43,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:43,574 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-15 01:22:43,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:43,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706959291] [2020-09-15 01:22:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:44,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706959291] [2020-09-15 01:22:44,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929745176] [2020-09-15 01:22:44,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:44,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:44,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:44,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:44,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:44,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:44,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:44,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:44,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161362731] [2020-09-15 01:22:44,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:44,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:44,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:44,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:44,141 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-15 01:22:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:45,231 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-15 01:22:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:22:45,232 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:45,233 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:22:45,233 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:22:45,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:22:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:22:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-15 01:22:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:22:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-15 01:22:45,236 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-15 01:22:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:45,236 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-15 01:22:45,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-15 01:22:45,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:45,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:45,236 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:45,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-15 01:22:45,437 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:45,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:45,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-15 01:22:45,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:45,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466792933] [2020-09-15 01:22:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:45,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466792933] [2020-09-15 01:22:45,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156912912] [2020-09-15 01:22:45,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:45,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:22:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:45,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:45,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:45,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:45,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989481967] [2020-09-15 01:22:45,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:45,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:45,956 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-15 01:22:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:46,981 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-15 01:22:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:22:46,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:46,982 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:22:46,982 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:22:46,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:22:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:22:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-15 01:22:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:22:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-15 01:22:46,985 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-15 01:22:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:46,985 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-15 01:22:46,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-15 01:22:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:46,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:46,986 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:47,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:47,187 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-15 01:22:47,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:47,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168494987] [2020-09-15 01:22:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:47,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168494987] [2020-09-15 01:22:47,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532383628] [2020-09-15 01:22:47,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:47,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:22:47,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:47,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:47,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:47,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:47,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:47,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:47,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988792378] [2020-09-15 01:22:47,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:47,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:47,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:47,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:47,757 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-15 01:22:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:48,974 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-15 01:22:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:22:48,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:48,976 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:22:48,976 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:22:48,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:22:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:22:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-15 01:22:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:22:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-15 01:22:48,980 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-15 01:22:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:48,980 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-15 01:22:48,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-15 01:22:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:48,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:48,981 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:49,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-15 01:22:49,182 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-15 01:22:49,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:49,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629490259] [2020-09-15 01:22:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:49,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629490259] [2020-09-15 01:22:49,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266244790] [2020-09-15 01:22:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:49,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:49,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:49,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:49,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668988379] [2020-09-15 01:22:49,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:49,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:49,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:49,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:49,687 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-15 01:22:50,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:50,832 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-15 01:22:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:22:50,834 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:50,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:50,834 INFO L225 Difference]: With dead ends: 135 [2020-09-15 01:22:50,834 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 01:22:50,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:22:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 01:22:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-15 01:22:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:22:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-15 01:22:50,837 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-15 01:22:50,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:50,837 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-15 01:22:50,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-15 01:22:50,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:50,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:50,838 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:51,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:51,039 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:51,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:51,039 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-15 01:22:51,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:51,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563041820] [2020-09-15 01:22:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:51,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563041820] [2020-09-15 01:22:51,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115405055] [2020-09-15 01:22:51,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:51,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:22:51,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:51,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:51,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:51,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:51,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:51,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171210147] [2020-09-15 01:22:51,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:51,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:51,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:51,588 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-15 01:22:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:52,909 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-15 01:22:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:22:52,910 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:52,911 INFO L225 Difference]: With dead ends: 132 [2020-09-15 01:22:52,911 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 01:22:52,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:22:52,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 01:22:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-15 01:22:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:22:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-15 01:22:52,913 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-15 01:22:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:52,913 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-15 01:22:52,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-15 01:22:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:52,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:52,914 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:53,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:53,115 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:53,115 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-15 01:22:53,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:53,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265033585] [2020-09-15 01:22:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:53,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265033585] [2020-09-15 01:22:53,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101278211] [2020-09-15 01:22:53,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:53,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:22:53,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:53,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:53,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:53,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:53,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:53,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484233889] [2020-09-15 01:22:53,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:53,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:53,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:53,629 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-15 01:22:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:54,853 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-15 01:22:54,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:22:54,855 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:54,855 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:22:54,855 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:22:54,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:22:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:22:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-15 01:22:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:22:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-15 01:22:54,858 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-15 01:22:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:54,859 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-15 01:22:54,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-15 01:22:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:54,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:54,859 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:55,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:55,060 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-15 01:22:55,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:55,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003109023] [2020-09-15 01:22:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:55,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003109023] [2020-09-15 01:22:55,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957584177] [2020-09-15 01:22:55,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:55,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:22:55,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:55,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:55,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:55,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:55,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790191144] [2020-09-15 01:22:55,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:55,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:55,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:55,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:55,603 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-15 01:22:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:57,029 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-15 01:22:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:22:57,030 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:22:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:57,031 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:22:57,031 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:22:57,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:22:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:22:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-15 01:22:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:22:57,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-15 01:22:57,033 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-15 01:22:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:57,033 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-15 01:22:57,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:22:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-15 01:22:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:57,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:57,034 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:57,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:22:57,235 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:57,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-15 01:22:57,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:57,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622952596] [2020-09-15 01:22:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:57,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622952596] [2020-09-15 01:22:57,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634141815] [2020-09-15 01:22:57,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:57,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:22:57,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:57,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:57,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:22:57,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624459521] [2020-09-15 01:22:57,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:22:57,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:57,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:22:57,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:22:57,719 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-15 01:22:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:22:58,999 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-15 01:22:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:22:59,001 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:22:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:22:59,001 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:22:59,001 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:22:59,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:22:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:22:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-15 01:22:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:22:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-15 01:22:59,005 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-15 01:22:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:22:59,005 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-15 01:22:59,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:22:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-15 01:22:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:22:59,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:22:59,006 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:22:59,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-15 01:22:59,209 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:22:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:22:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-15 01:22:59,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:22:59,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978991629] [2020-09-15 01:22:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:22:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:22:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:59,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978991629] [2020-09-15 01:22:59,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784642650] [2020-09-15 01:22:59,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:22:59,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:22:59,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:22:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:22:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:22:59,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:22:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:22:59,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:22:59,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:22:59,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151324804] [2020-09-15 01:22:59,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:22:59,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:22:59,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:22:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:22:59,728 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-15 01:23:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:01,259 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-15 01:23:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:23:01,260 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:23:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:01,260 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:23:01,260 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:23:01,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:23:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:23:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-15 01:23:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:23:01,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-15 01:23:01,263 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-15 01:23:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:01,263 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-15 01:23:01,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-15 01:23:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:01,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:01,264 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:01,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-15 01:23:01,465 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:01,465 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-15 01:23:01,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:01,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456612721] [2020-09-15 01:23:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:01,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456612721] [2020-09-15 01:23:01,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919047657] [2020-09-15 01:23:01,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:23:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:01,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:01,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:01,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:01,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:23:01,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792291927] [2020-09-15 01:23:01,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:23:01,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:01,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:23:01,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:23:01,932 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-15 01:23:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:03,295 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-15 01:23:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:23:03,296 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:23:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:03,297 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:23:03,297 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:23:03,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:23:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:23:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-15 01:23:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:23:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-15 01:23:03,300 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-15 01:23:03,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:03,300 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-15 01:23:03,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:23:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-15 01:23:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:03,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:03,301 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:03,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-15 01:23:03,502 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:03,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:03,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-15 01:23:03,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:03,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851373370] [2020-09-15 01:23:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:03,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851373370] [2020-09-15 01:23:03,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209454877] [2020-09-15 01:23:03,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:23:03,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:03,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:03,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:03,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:03,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:04,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:04,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:23:04,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056009845] [2020-09-15 01:23:04,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:04,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:04,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:04,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:04,020 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-15 01:23:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:05,730 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-15 01:23:05,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:23:05,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:23:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:05,732 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:23:05,732 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:23:05,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:23:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:23:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-15 01:23:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:23:05,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-15 01:23:05,735 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-15 01:23:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:05,735 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-15 01:23:05,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-15 01:23:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:05,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:05,736 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:05,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-15 01:23:05,937 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:05,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-15 01:23:05,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:05,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551078443] [2020-09-15 01:23:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:06,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551078443] [2020-09-15 01:23:06,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164560304] [2020-09-15 01:23:06,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:23:06,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:23:06,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:06,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:06,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:23:06,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508978307] [2020-09-15 01:23:06,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:23:06,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:23:06,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:23:06,426 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-15 01:23:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:07,905 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-15 01:23:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:23:07,906 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:23:07,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:07,907 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:23:07,907 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:23:07,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:23:07,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:23:07,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-15 01:23:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 01:23:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-15 01:23:07,910 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-15 01:23:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:07,910 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-15 01:23:07,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:23:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-15 01:23:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:07,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:07,911 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:08,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:08,113 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:08,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-15 01:23:08,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:08,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061051014] [2020-09-15 01:23:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:08,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061051014] [2020-09-15 01:23:08,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388402171] [2020-09-15 01:23:08,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:23:08,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:23:08,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:08,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:08,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:08,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:08,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:08,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:23:08,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691517420] [2020-09-15 01:23:08,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:08,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:08,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:08,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:08,648 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-15 01:23:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:10,515 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-15 01:23:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:23:10,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:23:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:10,517 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:23:10,517 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:23:10,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:23:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:23:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-15 01:23:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:23:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-15 01:23:10,520 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-15 01:23:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:10,520 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-15 01:23:10,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-15 01:23:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:10,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:10,521 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:10,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-15 01:23:10,728 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:10,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-15 01:23:10,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:10,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162498335] [2020-09-15 01:23:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:11,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162498335] [2020-09-15 01:23:11,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145267461] [2020-09-15 01:23:11,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:23:11,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:23:11,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:11,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:11,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:11,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 01:23:11,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830738234] [2020-09-15 01:23:11,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 01:23:11,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 01:23:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:23:11,231 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-15 01:23:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:12,755 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-15 01:23:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:23:12,757 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-15 01:23:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:12,757 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:23:12,757 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:23:12,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:23:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:23:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-15 01:23:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:23:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-15 01:23:12,761 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-15 01:23:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:12,761 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-15 01:23:12,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 01:23:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-15 01:23:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 01:23:12,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:12,762 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:12,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:12,973 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:12,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:12,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-15 01:23:12,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:12,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015385717] [2020-09-15 01:23:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:13,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015385717] [2020-09-15 01:23:13,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484875667] [2020-09-15 01:23:13,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 01:23:13,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:23:13,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:13,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 01:23:13,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:13,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:13,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:13,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-15 01:23:13,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127763338] [2020-09-15 01:23:13,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:13,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:13,491 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-15 01:23:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:15,344 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-15 01:23:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:23:15,346 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 01:23:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:15,346 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:23:15,346 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:23:15,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:23:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:23:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-15 01:23:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:23:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-15 01:23:15,349 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-15 01:23:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:15,350 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-15 01:23:15,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:15,350 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-15 01:23:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:15,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:15,351 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:15,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-15 01:23:15,551 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:15,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-15 01:23:15,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:15,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125363888] [2020-09-15 01:23:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:16,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125363888] [2020-09-15 01:23:16,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896226228] [2020-09-15 01:23:16,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:16,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:16,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:16,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:16,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774472161] [2020-09-15 01:23:16,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:16,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:16,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:16,159 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-09-15 01:23:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:17,015 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-09-15 01:23:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:23:17,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:17,017 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:23:17,017 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:23:17,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:23:17,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:23:17,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-09-15 01:23:17,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:17,020 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:17,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:17,020 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:17,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:17,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:17,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:17,021 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:17,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:17,222 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-09-15 01:23:17,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:17,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472350952] [2020-09-15 01:23:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:17,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472350952] [2020-09-15 01:23:17,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270589605] [2020-09-15 01:23:17,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:17,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:17,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:17,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:17,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:17,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:17,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:17,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:17,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166983992] [2020-09-15 01:23:17,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:17,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:17,891 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:18,880 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-09-15 01:23:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:23:18,881 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:18,882 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:23:18,882 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 01:23:18,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:23:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 01:23:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-09-15 01:23:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:18,884 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:18,884 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:18,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:18,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:18,885 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:19,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-09-15 01:23:19,086 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:19,086 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-09-15 01:23:19,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:19,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164650128] [2020-09-15 01:23:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:19,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164650128] [2020-09-15 01:23:19,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771225045] [2020-09-15 01:23:19,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:19,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:23:19,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:19,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:19,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:19,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:19,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:19,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241810094] [2020-09-15 01:23:19,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:19,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:19,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:19,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:19,678 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:20,645 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-09-15 01:23:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:23:20,646 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:20,646 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:23:20,646 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 01:23:20,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:23:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 01:23:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-09-15 01:23:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:20,648 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:20,649 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:20,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:20,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:20,649 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:20,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:20,850 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:20,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-09-15 01:23:20,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:20,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420859439] [2020-09-15 01:23:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:21,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420859439] [2020-09-15 01:23:21,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083608515] [2020-09-15 01:23:21,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:21,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:23:21,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:21,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:21,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:21,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:21,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:21,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494057479] [2020-09-15 01:23:21,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:21,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:21,489 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:22,583 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-15 01:23:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:23:22,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:22,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:22,585 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:23:22,585 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:23:22,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:23:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:23:22,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-09-15 01:23:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:22,588 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:22,588 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:22,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:22,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:22,589 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:22,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-15 01:23:22,790 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-09-15 01:23:22,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:22,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573984895] [2020-09-15 01:23:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:23,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573984895] [2020-09-15 01:23:23,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958809738] [2020-09-15 01:23:23,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:23,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:23:23,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:23,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:23,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:23,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:23,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:23,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157640635] [2020-09-15 01:23:23,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:23,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:23,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:23,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:23,371 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:24,466 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-15 01:23:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:23:24,467 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:24,468 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:23:24,468 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:23:24,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:23:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:23:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-09-15 01:23:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:24,471 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:24,471 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:24,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:24,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:24,472 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:24,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-15 01:23:24,681 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-09-15 01:23:24,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:24,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111879555] [2020-09-15 01:23:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:25,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111879555] [2020-09-15 01:23:25,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767070047] [2020-09-15 01:23:25,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:25,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:23:25,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:25,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:25,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:25,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:25,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:25,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053133961] [2020-09-15 01:23:25,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:25,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:25,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:25,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:25,326 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:26,609 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-09-15 01:23:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:23:26,610 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:26,611 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:23:26,611 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:23:26,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:23:26,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:23:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-09-15 01:23:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:26,613 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:26,613 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:26,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:26,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:26,614 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:26,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-15 01:23:26,815 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:26,815 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-09-15 01:23:26,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:26,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774773686] [2020-09-15 01:23:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:27,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774773686] [2020-09-15 01:23:27,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032339133] [2020-09-15 01:23:27,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:27,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:27,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:27,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:27,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624742591] [2020-09-15 01:23:27,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:27,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:27,372 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:28,513 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-09-15 01:23:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:23:28,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:28,514 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:23:28,515 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:23:28,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:23:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:23:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-09-15 01:23:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:28,518 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:28,518 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:28,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:28,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:28,519 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:28,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:28,723 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:28,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-09-15 01:23:28,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:28,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155588717] [2020-09-15 01:23:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:29,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155588717] [2020-09-15 01:23:29,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438646835] [2020-09-15 01:23:29,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:29,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:29,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:29,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:29,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:29,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:29,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:29,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185740395] [2020-09-15 01:23:29,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:29,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:29,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:29,335 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:30,710 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-15 01:23:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:23:30,711 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:30,711 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:23:30,712 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:23:30,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:23:30,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:23:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-09-15 01:23:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:30,715 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:30,715 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:30,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:30,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:30,716 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:30,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-15 01:23:30,917 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:30,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-09-15 01:23:30,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:30,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281562229] [2020-09-15 01:23:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:31,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281562229] [2020-09-15 01:23:31,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621718737] [2020-09-15 01:23:31,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:31,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:23:31,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:31,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:31,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:31,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:31,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35204340] [2020-09-15 01:23:31,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:31,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:31,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:31,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:31,468 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:32,702 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-09-15 01:23:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:23:32,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:32,703 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:23:32,704 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:23:32,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:23:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:23:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-09-15 01:23:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:32,706 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:32,706 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:32,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:32,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:32,707 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:32,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:32,908 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-09-15 01:23:32,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:32,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905040709] [2020-09-15 01:23:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:33,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905040709] [2020-09-15 01:23:33,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697321535] [2020-09-15 01:23:33,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:33,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:23:33,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:33,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:33,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:33,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:33,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:33,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:33,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114598286] [2020-09-15 01:23:33,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:33,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:33,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:33,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:33,497 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:35,051 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-09-15 01:23:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:23:35,052 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:35,053 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:23:35,053 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:23:35,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:23:35,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:23:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-09-15 01:23:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:35,055 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:35,056 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:35,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:35,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:35,056 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:35,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-15 01:23:35,258 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:35,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:35,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-09-15 01:23:35,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:35,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221165106] [2020-09-15 01:23:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:35,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221165106] [2020-09-15 01:23:35,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571799222] [2020-09-15 01:23:35,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:35,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:23:35,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:35,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:35,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:35,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078239135] [2020-09-15 01:23:35,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:35,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:35,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:35,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:35,808 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:37,212 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-09-15 01:23:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:23:37,213 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:37,213 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:23:37,214 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:23:37,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:23:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:23:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-09-15 01:23:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:37,217 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:37,217 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:37,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:37,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:37,217 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:37,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:37,418 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:37,419 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-09-15 01:23:37,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:37,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043027197] [2020-09-15 01:23:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:37,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043027197] [2020-09-15 01:23:37,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398887348] [2020-09-15 01:23:37,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:37,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:23:37,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:37,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:37,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:37,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:37,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:37,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032750109] [2020-09-15 01:23:37,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:37,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:37,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:37,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:37,996 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:39,770 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-09-15 01:23:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:23:39,772 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:39,772 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:23:39,772 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:23:39,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:23:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:23:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-09-15 01:23:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:39,776 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:39,776 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:39,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:39,776 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:39,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:39,776 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:39,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-15 01:23:39,980 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-09-15 01:23:39,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:39,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611724393] [2020-09-15 01:23:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:40,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611724393] [2020-09-15 01:23:40,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543625809] [2020-09-15 01:23:40,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:40,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:40,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:40,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:40,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:40,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595332793] [2020-09-15 01:23:40,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:40,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:40,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:40,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:40,511 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:41,966 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-09-15 01:23:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:23:41,967 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:41,968 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:23:41,968 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:23:41,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:23:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:23:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-15 01:23:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:41,970 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:41,971 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:41,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:41,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:41,971 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:42,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:42,172 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-09-15 01:23:42,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:42,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601670655] [2020-09-15 01:23:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:42,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601670655] [2020-09-15 01:23:42,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701842579] [2020-09-15 01:23:42,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:42,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:42,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:42,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:42,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:42,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:42,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:42,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393790423] [2020-09-15 01:23:42,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:42,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:42,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:42,738 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:44,564 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-09-15 01:23:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:23:44,565 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:44,566 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:23:44,566 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:23:44,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:23:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:23:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-09-15 01:23:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:44,568 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:44,569 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:44,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:44,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:44,569 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:44,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:44,770 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-09-15 01:23:44,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:44,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719631271] [2020-09-15 01:23:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:45,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719631271] [2020-09-15 01:23:45,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218894947] [2020-09-15 01:23:45,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:45,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:23:45,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:45,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:45,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:45,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:45,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340869239] [2020-09-15 01:23:45,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:45,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:45,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:45,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:45,300 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:46,849 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-15 01:23:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:23:46,850 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:46,851 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:23:46,851 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:23:46,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:23:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:23:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-09-15 01:23:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:46,854 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:46,855 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:46,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:46,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:46,855 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:47,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-15 01:23:47,056 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:47,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-09-15 01:23:47,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:47,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277441180] [2020-09-15 01:23:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:47,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277441180] [2020-09-15 01:23:47,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898252815] [2020-09-15 01:23:47,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:47,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:23:47,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:47,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:47,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:47,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:47,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:47,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:47,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201687152] [2020-09-15 01:23:47,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:47,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:47,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:47,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:47,633 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:49,615 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-15 01:23:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:23:49,617 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:49,617 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:23:49,617 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 01:23:49,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:23:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 01:23:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-09-15 01:23:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:49,620 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:49,620 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:49,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:49,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:49,620 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:49,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-15 01:23:49,821 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:49,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:49,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-09-15 01:23:49,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:49,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679855214] [2020-09-15 01:23:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:50,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679855214] [2020-09-15 01:23:50,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379915905] [2020-09-15 01:23:50,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:50,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 01:23:50,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:50,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:50,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:50,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:50,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376312387] [2020-09-15 01:23:50,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:50,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:50,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:50,349 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:52,020 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-09-15 01:23:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:23:52,021 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:52,022 INFO L225 Difference]: With dead ends: 110 [2020-09-15 01:23:52,022 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:23:52,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:23:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:23:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-09-15 01:23:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:23:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:23:52,025 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-15 01:23:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:52,025 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:23:52,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:23:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:52,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:52,026 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:52,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-15 01:23:52,227 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-09-15 01:23:52,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:52,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747737193] [2020-09-15 01:23:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:52,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747737193] [2020-09-15 01:23:52,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707998436] [2020-09-15 01:23:52,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:52,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 01:23:52,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:52,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:52,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:52,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:52,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:52,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862828660] [2020-09-15 01:23:52,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:52,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:52,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:52,813 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-15 01:23:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:55,045 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-09-15 01:23:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:23:55,046 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:23:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:55,046 INFO L225 Difference]: With dead ends: 109 [2020-09-15 01:23:55,046 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:23:55,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:23:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:23:55,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-09-15 01:23:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:23:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:23:55,048 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-15 01:23:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:55,048 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:23:55,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:23:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:23:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:55,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:55,049 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:55,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-15 01:23:55,250 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:55,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:55,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-09-15 01:23:55,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:55,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887115472] [2020-09-15 01:23:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:55,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887115472] [2020-09-15 01:23:55,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884712785] [2020-09-15 01:23:55,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:55,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:55,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:55,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 01:23:55,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650999606] [2020-09-15 01:23:55,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 01:23:55,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:55,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 01:23:55,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:23:55,777 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-15 01:23:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:23:57,569 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-15 01:23:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:23:57,571 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-15 01:23:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:23:57,571 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:23:57,571 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:23:57,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:23:57,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:23:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-09-15 01:23:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 01:23:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-09-15 01:23:57,574 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-09-15 01:23:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:23:57,574 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-09-15 01:23:57,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 01:23:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-09-15 01:23:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:23:57,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:23:57,575 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:23:57,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-15 01:23:57,776 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:23:57,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:23:57,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-09-15 01:23:57,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:23:57,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073246638] [2020-09-15 01:23:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:23:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:23:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:58,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073246638] [2020-09-15 01:23:58,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367615861] [2020-09-15 01:23:58,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:23:58,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:23:58,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:23:58,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:23:58,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:23:58,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:23:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:23:58,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:23:58,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:23:58,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350678895] [2020-09-15 01:23:58,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:23:58,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:23:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:23:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:23:58,338 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-09-15 01:24:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:00,481 INFO L93 Difference]: Finished difference Result 106 states and 265 transitions. [2020-09-15 01:24:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:24:00,482 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:24:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:00,482 INFO L225 Difference]: With dead ends: 106 [2020-09-15 01:24:00,482 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:24:00,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:24:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:24:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-15 01:24:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 01:24:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-09-15 01:24:00,485 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-09-15 01:24:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:00,485 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-09-15 01:24:00,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-09-15 01:24:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 01:24:00,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:00,486 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:00,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:00,687 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:00,687 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-09-15 01:24:00,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:00,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592787812] [2020-09-15 01:24:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:01,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592787812] [2020-09-15 01:24:01,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237947258] [2020-09-15 01:24:01,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:01,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 01:24:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 01:24:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:01,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:24:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:01,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:01,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 01:24:01,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981591329] [2020-09-15 01:24:01,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:01,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:01,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:01,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:01,256 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-09-15 01:24:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:03,323 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-15 01:24:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:24:03,324 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 01:24:03,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:03,324 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:24:03,324 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:24:03,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:24:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:24:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-09-15 01:24:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:24:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-15 01:24:03,326 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-09-15 01:24:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:03,327 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-15 01:24:03,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-15 01:24:03,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:03,327 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:03,327 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:03,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-15 01:24:03,528 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:03,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-09-15 01:24:03,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:03,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20652518] [2020-09-15 01:24:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:04,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20652518] [2020-09-15 01:24:04,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590848675] [2020-09-15 01:24:04,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:04,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:24:04,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:04,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:04,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:24:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:04,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:04,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:04,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537705464] [2020-09-15 01:24:04,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:04,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:04,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:04,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:04,165 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-09-15 01:24:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:06,397 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-09-15 01:24:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:24:06,403 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:06,404 INFO L225 Difference]: With dead ends: 102 [2020-09-15 01:24:06,404 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:24:06,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:24:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:24:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-09-15 01:24:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 01:24:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-15 01:24:06,406 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-09-15 01:24:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:06,406 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-15 01:24:06,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-15 01:24:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:06,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:06,407 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:06,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:06,608 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:06,608 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-09-15 01:24:06,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:06,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155181063] [2020-09-15 01:24:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:07,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155181063] [2020-09-15 01:24:07,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040994979] [2020-09-15 01:24:07,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:07,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:24:07,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:07,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:07,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:07,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:07,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711091075] [2020-09-15 01:24:07,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:07,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:07,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:07,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:07,342 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-09-15 01:24:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:08,307 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-09-15 01:24:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:24:08,309 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:08,309 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:24:08,309 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 01:24:08,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:24:08,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 01:24:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-09-15 01:24:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:24:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-09-15 01:24:08,321 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-09-15 01:24:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:08,321 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-09-15 01:24:08,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-09-15 01:24:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:08,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:08,322 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:08,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:08,528 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:08,529 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-09-15 01:24:08,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:08,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080774008] [2020-09-15 01:24:08,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:09,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080774008] [2020-09-15 01:24:09,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000590315] [2020-09-15 01:24:09,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:09,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:24:09,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:09,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:09,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:09,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:09,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:09,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:09,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020315925] [2020-09-15 01:24:09,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:09,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:09,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:09,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:09,254 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-09-15 01:24:10,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:10,277 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-09-15 01:24:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:24:10,278 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:10,279 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:24:10,279 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:24:10,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:24:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:24:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-09-15 01:24:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:24:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-09-15 01:24:10,282 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-09-15 01:24:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:10,282 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-09-15 01:24:10,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-09-15 01:24:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:10,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:10,282 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:10,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:10,483 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-09-15 01:24:10,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:10,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489336812] [2020-09-15 01:24:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:11,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489336812] [2020-09-15 01:24:11,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519378516] [2020-09-15 01:24:11,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:11,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:11,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:11,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681511231] [2020-09-15 01:24:11,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:11,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:11,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:11,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:11,146 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-09-15 01:24:12,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:12,216 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-09-15 01:24:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:24:12,218 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:12,218 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:24:12,218 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:24:12,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:24:12,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:24:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-09-15 01:24:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:24:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-09-15 01:24:12,221 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-09-15 01:24:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:12,221 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-09-15 01:24:12,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-09-15 01:24:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:12,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:12,222 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:12,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:12,423 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-09-15 01:24:12,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:12,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839073246] [2020-09-15 01:24:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:13,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839073246] [2020-09-15 01:24:13,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68338995] [2020-09-15 01:24:13,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:13,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:24:13,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:13,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:13,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:13,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:13,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:13,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:13,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878215493] [2020-09-15 01:24:13,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:13,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:13,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:13,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:13,127 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-09-15 01:24:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:14,226 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-09-15 01:24:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:24:14,227 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:14,228 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:24:14,228 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:24:14,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:24:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:24:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-09-15 01:24:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:24:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-09-15 01:24:14,230 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-09-15 01:24:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:14,230 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-09-15 01:24:14,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-09-15 01:24:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:14,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:14,231 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:14,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-15 01:24:14,432 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:14,432 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-09-15 01:24:14,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:14,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466758802] [2020-09-15 01:24:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:14,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466758802] [2020-09-15 01:24:14,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900752748] [2020-09-15 01:24:14,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:15,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:24:15,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:15,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:15,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:15,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:15,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875284545] [2020-09-15 01:24:15,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:15,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:15,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:15,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:15,083 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-09-15 01:24:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:16,277 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-09-15 01:24:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:24:16,279 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:16,279 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:24:16,279 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:24:16,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:24:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:24:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-09-15 01:24:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 01:24:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-09-15 01:24:16,282 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-09-15 01:24:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:16,282 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-09-15 01:24:16,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-09-15 01:24:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:16,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:16,282 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:16,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-15 01:24:16,483 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:16,484 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-09-15 01:24:16,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:16,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35829726] [2020-09-15 01:24:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:17,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35829726] [2020-09-15 01:24:17,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958166426] [2020-09-15 01:24:17,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:17,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:24:17,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:17,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:17,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:17,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:17,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:17,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:17,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479252726] [2020-09-15 01:24:17,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:17,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:17,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:17,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:17,198 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-09-15 01:24:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:18,513 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-09-15 01:24:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:24:18,514 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:18,514 INFO L225 Difference]: With dead ends: 146 [2020-09-15 01:24:18,514 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:24:18,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:24:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:24:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-09-15 01:24:18,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:24:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-09-15 01:24:18,517 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-09-15 01:24:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:18,518 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-09-15 01:24:18,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-09-15 01:24:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:18,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:18,519 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:18,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-15 01:24:18,723 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:18,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-09-15 01:24:18,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:18,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174562879] [2020-09-15 01:24:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:19,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174562879] [2020-09-15 01:24:19,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89841083] [2020-09-15 01:24:19,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:19,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:24:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:19,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:19,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:19,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:19,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179412923] [2020-09-15 01:24:19,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:19,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:19,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:19,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:19,354 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-09-15 01:24:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:20,666 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-09-15 01:24:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:24:20,668 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:20,669 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:24:20,669 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:24:20,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:24:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:24:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-09-15 01:24:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:24:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-09-15 01:24:20,671 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-09-15 01:24:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:20,671 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-09-15 01:24:20,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-09-15 01:24:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:20,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:20,672 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:20,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-15 01:24:20,873 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-09-15 01:24:20,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:20,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326012133] [2020-09-15 01:24:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:21,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326012133] [2020-09-15 01:24:21,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739330591] [2020-09-15 01:24:21,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:21,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:24:21,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:21,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:21,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:21,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:21,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:21,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:21,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307639343] [2020-09-15 01:24:21,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:21,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:21,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:21,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:21,575 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-09-15 01:24:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:23,043 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-09-15 01:24:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:24:23,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:23,045 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:24:23,045 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:24:23,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:24:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:24:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-09-15 01:24:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:24:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-09-15 01:24:23,048 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-09-15 01:24:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:23,048 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-09-15 01:24:23,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-09-15 01:24:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:23,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:23,049 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:23,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:23,250 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:23,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:23,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-09-15 01:24:23,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:23,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220284834] [2020-09-15 01:24:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:23,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220284834] [2020-09-15 01:24:23,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195803811] [2020-09-15 01:24:23,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:23,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:23,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:23,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:23,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:23,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750251819] [2020-09-15 01:24:23,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:23,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:23,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:23,902 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-09-15 01:24:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:25,196 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-09-15 01:24:25,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:24:25,197 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:25,197 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:24:25,198 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 01:24:25,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:24:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 01:24:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-09-15 01:24:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:24:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-09-15 01:24:25,201 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-09-15 01:24:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:25,201 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-09-15 01:24:25,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-09-15 01:24:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:25,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:25,201 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:25,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-15 01:24:25,410 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:25,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-09-15 01:24:25,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:25,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005515525] [2020-09-15 01:24:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:25,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005515525] [2020-09-15 01:24:25,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630699735] [2020-09-15 01:24:25,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:25,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:24:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:26,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:26,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:26,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:26,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743255130] [2020-09-15 01:24:26,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:26,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:26,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:26,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:26,033 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-09-15 01:24:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:27,495 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-09-15 01:24:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:24:27,496 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:27,496 INFO L225 Difference]: With dead ends: 142 [2020-09-15 01:24:27,496 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:24:27,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:24:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:24:27,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-09-15 01:24:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:24:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-09-15 01:24:27,499 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-09-15 01:24:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:27,499 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-09-15 01:24:27,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-09-15 01:24:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:27,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:27,500 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:27,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:27,701 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-09-15 01:24:27,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:27,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310725053] [2020-09-15 01:24:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:28,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310725053] [2020-09-15 01:24:28,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611385412] [2020-09-15 01:24:28,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:28,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:24:28,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:28,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:28,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:28,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:28,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299988390] [2020-09-15 01:24:28,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:28,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:28,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:28,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:28,271 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-09-15 01:24:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:29,627 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-09-15 01:24:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:24:29,628 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:29,629 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:24:29,629 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 01:24:29,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:24:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 01:24:29,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-09-15 01:24:29,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:24:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-09-15 01:24:29,632 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-09-15 01:24:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:29,632 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-09-15 01:24:29,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-09-15 01:24:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:29,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:29,633 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:29,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:29,833 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:29,834 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-09-15 01:24:29,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:29,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032671237] [2020-09-15 01:24:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:30,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032671237] [2020-09-15 01:24:30,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843044664] [2020-09-15 01:24:30,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:30,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:24:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:30,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:30,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:30,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:30,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833830196] [2020-09-15 01:24:30,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:30,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:30,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:30,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:30,443 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-09-15 01:24:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:32,019 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-09-15 01:24:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:24:32,020 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:32,021 INFO L225 Difference]: With dead ends: 140 [2020-09-15 01:24:32,021 INFO L226 Difference]: Without dead ends: 134 [2020-09-15 01:24:32,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:24:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-15 01:24:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-09-15 01:24:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:24:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-09-15 01:24:32,023 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-09-15 01:24:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:32,024 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-09-15 01:24:32,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-09-15 01:24:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:32,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:32,024 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:32,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:32,225 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:32,226 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-09-15 01:24:32,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:32,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495899513] [2020-09-15 01:24:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:32,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495899513] [2020-09-15 01:24:32,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376833689] [2020-09-15 01:24:32,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:32,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:24:32,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:32,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:32,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:32,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798262355] [2020-09-15 01:24:32,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:32,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:32,787 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-09-15 01:24:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:34,229 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-09-15 01:24:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:24:34,230 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:34,230 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:24:34,230 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 01:24:34,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:24:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 01:24:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-09-15 01:24:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 01:24:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-09-15 01:24:34,233 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-09-15 01:24:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:34,233 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-09-15 01:24:34,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:34,233 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-09-15 01:24:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:34,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:34,234 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:34,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:34,435 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-09-15 01:24:34,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:34,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17103649] [2020-09-15 01:24:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:34,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17103649] [2020-09-15 01:24:34,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198291397] [2020-09-15 01:24:34,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:34,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:24:34,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:34,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:34,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:35,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:35,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:35,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:35,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220581809] [2020-09-15 01:24:35,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:35,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:35,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:35,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:35,042 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-09-15 01:24:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:36,762 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-09-15 01:24:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:24:36,763 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:36,764 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:24:36,764 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 01:24:36,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:24:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 01:24:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-09-15 01:24:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:24:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-09-15 01:24:36,767 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-09-15 01:24:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:36,768 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-09-15 01:24:36,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-09-15 01:24:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:36,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:36,768 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:36,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:36,971 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-09-15 01:24:36,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:36,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470479686] [2020-09-15 01:24:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:37,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470479686] [2020-09-15 01:24:37,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046977532] [2020-09-15 01:24:37,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:37,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:37,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:37,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:37,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145577477] [2020-09-15 01:24:37,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:37,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:37,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:37,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:37,550 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-09-15 01:24:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:39,089 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-09-15 01:24:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:24:39,090 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:39,091 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:24:39,091 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:24:39,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:24:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:24:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-09-15 01:24:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:24:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-09-15 01:24:39,093 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-09-15 01:24:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:39,093 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-09-15 01:24:39,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-09-15 01:24:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:39,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:39,094 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:39,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-15 01:24:39,298 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:39,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-09-15 01:24:39,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:39,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463039700] [2020-09-15 01:24:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:39,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463039700] [2020-09-15 01:24:39,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133006989] [2020-09-15 01:24:39,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:39,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:24:39,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:39,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:39,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:39,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:39,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:39,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:39,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290241165] [2020-09-15 01:24:39,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:39,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:39,887 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-09-15 01:24:41,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:41,915 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-09-15 01:24:41,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:24:41,917 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:41,918 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:24:41,918 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:24:41,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:24:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:24:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-09-15 01:24:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 01:24:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-09-15 01:24:41,926 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-09-15 01:24:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:41,926 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-09-15 01:24:41,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-09-15 01:24:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:41,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:41,927 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:42,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-15 01:24:42,132 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-09-15 01:24:42,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:42,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185755487] [2020-09-15 01:24:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:42,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185755487] [2020-09-15 01:24:42,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537454528] [2020-09-15 01:24:42,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:42,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:24:42,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:42,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:42,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:42,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:42,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256839884] [2020-09-15 01:24:42,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:42,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:42,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:42,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:42,768 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-09-15 01:24:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:44,663 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-15 01:24:44,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:24:44,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:44,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:44,665 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:24:44,666 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:24:44,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:24:44,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:24:44,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-09-15 01:24:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:24:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-15 01:24:44,668 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-09-15 01:24:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:44,668 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-15 01:24:44,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-15 01:24:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:44,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:44,669 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:44,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-15 01:24:44,870 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:44,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-09-15 01:24:44,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:44,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355645385] [2020-09-15 01:24:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:45,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355645385] [2020-09-15 01:24:45,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865673190] [2020-09-15 01:24:45,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:45,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:24:45,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:45,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:45,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:45,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:45,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:45,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322989254] [2020-09-15 01:24:45,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:45,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:45,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:45,551 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-09-15 01:24:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:47,938 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-15 01:24:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:24:47,940 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:47,940 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:24:47,940 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:24:47,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:24:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:24:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-09-15 01:24:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:24:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-15 01:24:47,942 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-09-15 01:24:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:47,942 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-15 01:24:47,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-15 01:24:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:47,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:47,943 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:48,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:48,144 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-09-15 01:24:48,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:48,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055430925] [2020-09-15 01:24:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:48,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055430925] [2020-09-15 01:24:48,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531507633] [2020-09-15 01:24:48,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:48,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:24:48,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:48,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:48,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:48,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:48,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:48,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912589134] [2020-09-15 01:24:48,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:48,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:48,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:48,780 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-09-15 01:24:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:50,781 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-09-15 01:24:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:24:50,782 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:50,782 INFO L225 Difference]: With dead ends: 135 [2020-09-15 01:24:50,782 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 01:24:50,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:24:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 01:24:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-09-15 01:24:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 01:24:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-09-15 01:24:50,785 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-09-15 01:24:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:50,786 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-09-15 01:24:50,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-09-15 01:24:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:50,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:50,787 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:50,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-15 01:24:50,988 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:50,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-09-15 01:24:50,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:50,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576060423] [2020-09-15 01:24:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:51,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576060423] [2020-09-15 01:24:51,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240438669] [2020-09-15 01:24:51,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:51,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:24:51,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:51,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:51,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:51,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:51,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:51,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846489006] [2020-09-15 01:24:51,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:51,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:51,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:51,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:51,646 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-09-15 01:24:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:53,941 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-09-15 01:24:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:24:53,942 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:53,943 INFO L225 Difference]: With dead ends: 132 [2020-09-15 01:24:53,943 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 01:24:53,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:24:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 01:24:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-09-15 01:24:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:24:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-15 01:24:53,946 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-09-15 01:24:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:53,946 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-15 01:24:53,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-15 01:24:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:53,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:53,946 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:54,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:54,149 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:54,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-09-15 01:24:54,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:54,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155716196] [2020-09-15 01:24:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:54,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155716196] [2020-09-15 01:24:54,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181410952] [2020-09-15 01:24:54,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:54,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:54,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:54,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:54,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 01:24:54,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826214570] [2020-09-15 01:24:54,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 01:24:54,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:54,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 01:24:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:24:54,782 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-09-15 01:24:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:56,767 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-09-15 01:24:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:24:56,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-15 01:24:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:56,769 INFO L225 Difference]: With dead ends: 152 [2020-09-15 01:24:56,769 INFO L226 Difference]: Without dead ends: 146 [2020-09-15 01:24:56,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:24:56,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-15 01:24:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-15 01:24:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:24:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-09-15 01:24:56,772 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-09-15 01:24:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:56,773 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-09-15 01:24:56,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 01:24:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-09-15 01:24:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 01:24:56,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:56,773 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:24:56,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-09-15 01:24:56,975 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:24:56,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:24:56,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-09-15 01:24:56,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:24:56,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330150833] [2020-09-15 01:24:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:24:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:24:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:57,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330150833] [2020-09-15 01:24:57,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366791052] [2020-09-15 01:24:57,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:24:57,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:24:57,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:24:57,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 01:24:57,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:24:57,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:24:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:24:57,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:24:57,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-15 01:24:57,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613811761] [2020-09-15 01:24:57,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:24:57,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:24:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:24:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:24:57,594 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-09-15 01:24:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:24:59,955 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-09-15 01:24:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:24:59,956 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 01:24:59,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:24:59,956 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:24:59,956 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:24:59,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:24:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:24:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-09-15 01:24:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 01:24:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-09-15 01:24:59,960 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-09-15 01:24:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:24:59,960 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-09-15 01:24:59,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:24:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-09-15 01:24:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:24:59,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:24:59,961 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:00,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:00,169 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:00,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:00,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-09-15 01:25:00,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:00,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444611610] [2020-09-15 01:25:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:00,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444611610] [2020-09-15 01:25:00,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805649032] [2020-09-15 01:25:00,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:01,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:25:01,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:01,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:01,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:01,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:01,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:01,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553880822] [2020-09-15 01:25:01,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:01,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:01,029 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-09-15 01:25:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:02,204 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-09-15 01:25:02,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:25:02,206 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:02,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:02,206 INFO L225 Difference]: With dead ends: 154 [2020-09-15 01:25:02,206 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:25:02,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:25:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:25:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-09-15 01:25:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:02,209 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:02,210 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:02,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:02,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:02,210 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:02,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:02,411 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-09-15 01:25:02,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:02,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789187059] [2020-09-15 01:25:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:03,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789187059] [2020-09-15 01:25:03,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908346756] [2020-09-15 01:25:03,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:03,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:25:03,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:03,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:03,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:03,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:03,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:03,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:03,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348092075] [2020-09-15 01:25:03,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:03,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:03,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:03,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:03,288 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:04,608 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-09-15 01:25:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:25:04,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:04,610 INFO L225 Difference]: With dead ends: 151 [2020-09-15 01:25:04,610 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 01:25:04,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:25:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 01:25:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-09-15 01:25:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:04,613 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:04,613 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:04,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:04,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:04,614 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:04,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:04,814 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:04,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:04,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-09-15 01:25:04,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:04,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382758253] [2020-09-15 01:25:04,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:05,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382758253] [2020-09-15 01:25:05,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168638091] [2020-09-15 01:25:05,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:05,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:25:05,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:05,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:05,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:05,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:05,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418460003] [2020-09-15 01:25:05,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:05,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:05,556 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:06,832 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-15 01:25:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:25:06,833 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:06,834 INFO L225 Difference]: With dead ends: 148 [2020-09-15 01:25:06,834 INFO L226 Difference]: Without dead ends: 142 [2020-09-15 01:25:06,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 01:25:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-15 01:25:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-09-15 01:25:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:06,837 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:06,837 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:06,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:06,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:06,837 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:07,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:07,038 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:07,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:07,039 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-09-15 01:25:07,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:07,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541785588] [2020-09-15 01:25:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:07,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541785588] [2020-09-15 01:25:07,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455551568] [2020-09-15 01:25:07,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:07,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:25:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:07,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:07,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:07,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:07,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142181570] [2020-09-15 01:25:07,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:07,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:07,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:07,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:07,840 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:09,265 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-09-15 01:25:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:25:09,267 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:09,268 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:25:09,268 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:25:09,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:25:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:25:09,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-09-15 01:25:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:09,270 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:09,271 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:09,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:09,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:09,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:09,271 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:09,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:09,472 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:09,473 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-09-15 01:25:09,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:09,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023899614] [2020-09-15 01:25:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:10,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023899614] [2020-09-15 01:25:10,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111437561] [2020-09-15 01:25:10,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:10,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:10,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:10,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618052358] [2020-09-15 01:25:10,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:10,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:10,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:10,176 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:11,531 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-09-15 01:25:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:25:11,533 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:11,533 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:25:11,534 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:25:11,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:25:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:25:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-09-15 01:25:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:11,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:11,536 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:11,536 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:11,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:11,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:11,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:11,537 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:11,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-15 01:25:11,738 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:11,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-09-15 01:25:11,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:11,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658093582] [2020-09-15 01:25:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:12,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658093582] [2020-09-15 01:25:12,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943452466] [2020-09-15 01:25:12,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:12,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:25:12,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:12,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:12,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:12,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:12,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:12,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:12,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855576908] [2020-09-15 01:25:12,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:12,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:12,526 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:14,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:14,153 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-09-15 01:25:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:25:14,154 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:14,155 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:25:14,155 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 01:25:14,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:25:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 01:25:14,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-09-15 01:25:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:14,158 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:14,158 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:14,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:14,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:14,159 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:14,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-15 01:25:14,360 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-09-15 01:25:14,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:14,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995545792] [2020-09-15 01:25:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:14,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995545792] [2020-09-15 01:25:14,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006462209] [2020-09-15 01:25:14,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:15,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:25:15,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:15,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:15,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:15,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:15,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:15,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833788655] [2020-09-15 01:25:15,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:15,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:15,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:15,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:15,084 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:16,556 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-09-15 01:25:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:25:16,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:16,558 INFO L225 Difference]: With dead ends: 140 [2020-09-15 01:25:16,558 INFO L226 Difference]: Without dead ends: 134 [2020-09-15 01:25:16,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:25:16,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-15 01:25:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-09-15 01:25:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:16,561 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:16,561 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:16,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:16,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:16,561 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:16,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-15 01:25:16,762 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:16,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:16,763 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-09-15 01:25:16,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:16,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627296129] [2020-09-15 01:25:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:17,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627296129] [2020-09-15 01:25:17,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521482797] [2020-09-15 01:25:17,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:17,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:25:17,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:17,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:17,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:17,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:17,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450165899] [2020-09-15 01:25:17,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:17,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:17,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:17,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:17,520 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:19,252 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-09-15 01:25:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:25:19,254 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:19,255 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:25:19,255 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:25:19,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:25:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:25:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-09-15 01:25:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:19,258 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:19,258 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:19,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:19,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:19,258 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:19,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-15 01:25:19,459 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-09-15 01:25:19,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:19,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74804302] [2020-09-15 01:25:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:20,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74804302] [2020-09-15 01:25:20,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544166888] [2020-09-15 01:25:20,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:20,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:25:20,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:20,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:20,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:20,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:20,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597519121] [2020-09-15 01:25:20,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:20,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:20,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:20,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:20,149 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:21,781 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-15 01:25:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:25:21,783 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:21,783 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:25:21,784 INFO L226 Difference]: Without dead ends: 130 [2020-09-15 01:25:21,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:25:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-15 01:25:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-09-15 01:25:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:21,786 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:21,787 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:21,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:21,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:21,787 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:21,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:21,988 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:21,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-09-15 01:25:21,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:21,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133992719] [2020-09-15 01:25:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:22,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133992719] [2020-09-15 01:25:22,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034454390] [2020-09-15 01:25:22,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:22,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:25:22,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:22,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:22,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:22,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:22,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:22,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134784237] [2020-09-15 01:25:22,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:22,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:22,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:22,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:22,760 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:24,645 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-09-15 01:25:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:25:24,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:24,647 INFO L225 Difference]: With dead ends: 135 [2020-09-15 01:25:24,647 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 01:25:24,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:25:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 01:25:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-09-15 01:25:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:24,650 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:24,650 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:24,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:24,650 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:24,650 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:24,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-09-15 01:25:24,851 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:24,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:24,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-09-15 01:25:24,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:24,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745238218] [2020-09-15 01:25:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:25,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745238218] [2020-09-15 01:25:25,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61146179] [2020-09-15 01:25:25,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:25,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:25,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:25,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986019044] [2020-09-15 01:25:25,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:25,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:25,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:25,566 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:27,379 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-09-15 01:25:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:25:27,381 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:27,381 INFO L225 Difference]: With dead ends: 132 [2020-09-15 01:25:27,382 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 01:25:27,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:25:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 01:25:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-15 01:25:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:27,384 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:27,384 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:27,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:27,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:27,385 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:27,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:27,587 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-09-15 01:25:27,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:27,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013857268] [2020-09-15 01:25:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:28,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013857268] [2020-09-15 01:25:28,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404002066] [2020-09-15 01:25:28,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:28,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:25:28,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:28,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:28,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:28,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:28,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:28,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:28,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037464439] [2020-09-15 01:25:28,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:28,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:28,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:28,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:28,338 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:30,363 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-09-15 01:25:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:25:30,364 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:30,365 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:25:30,365 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:25:30,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:25:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:25:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-09-15 01:25:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:30,368 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:30,368 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:30,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:30,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:30,369 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:30,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:30,570 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:30,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-09-15 01:25:30,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:30,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537051978] [2020-09-15 01:25:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:31,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537051978] [2020-09-15 01:25:31,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123561760] [2020-09-15 01:25:31,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:31,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:25:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:31,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:31,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:31,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:31,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898023300] [2020-09-15 01:25:31,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:31,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:31,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:31,254 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:33,147 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-09-15 01:25:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:25:33,148 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:33,149 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:25:33,149 INFO L226 Difference]: Without dead ends: 122 [2020-09-15 01:25:33,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:25:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-15 01:25:33,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-09-15 01:25:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:33,152 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:33,152 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:33,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:33,152 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:33,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:33,153 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:33,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:33,355 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-09-15 01:25:33,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:33,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763379038] [2020-09-15 01:25:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:33,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763379038] [2020-09-15 01:25:33,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726411366] [2020-09-15 01:25:33,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:34,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:25:34,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:34,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:34,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:34,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:34,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:34,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:34,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130067627] [2020-09-15 01:25:34,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:34,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:34,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:34,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:34,107 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:36,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:36,347 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-09-15 01:25:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:25:36,349 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:36,349 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:25:36,350 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:25:36,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:25:36,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:25:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-09-15 01:25:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:36,352 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:36,352 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:36,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:36,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:36,353 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:36,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:36,554 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:36,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:36,554 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-09-15 01:25:36,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:36,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419578433] [2020-09-15 01:25:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:37,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419578433] [2020-09-15 01:25:37,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373125970] [2020-09-15 01:25:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:37,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:25:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:37,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:37,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:37,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:37,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430614283] [2020-09-15 01:25:37,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:37,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:37,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:37,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:37,229 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:39,197 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-15 01:25:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:25:39,199 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:39,199 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:25:39,199 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:25:39,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:25:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:25:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-09-15 01:25:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:39,202 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:39,202 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:39,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:39,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:39,203 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:39,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-09-15 01:25:39,403 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:39,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:39,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-09-15 01:25:39,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:39,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016851245] [2020-09-15 01:25:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:40,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016851245] [2020-09-15 01:25:40,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229538625] [2020-09-15 01:25:40,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:40,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:25:40,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:40,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:40,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:40,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:40,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:40,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886992008] [2020-09-15 01:25:40,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:40,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:40,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:40,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:40,171 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:42,681 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-09-15 01:25:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:25:42,683 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:42,683 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:25:42,683 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:25:42,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:25:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:25:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-15 01:25:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:42,690 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:42,691 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:42,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:42,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:42,691 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:42,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-09-15 01:25:42,892 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:42,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-09-15 01:25:42,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:42,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251921130] [2020-09-15 01:25:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:43,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251921130] [2020-09-15 01:25:43,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137078551] [2020-09-15 01:25:43,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:43,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:43,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:43,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:43,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:43,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901656393] [2020-09-15 01:25:43,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:43,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:43,607 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:45,676 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-09-15 01:25:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:25:45,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:45,678 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:25:45,678 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:25:45,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:25:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:25:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-09-15 01:25:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:45,681 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:45,681 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:45,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:45,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:45,682 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:45,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-09-15 01:25:45,883 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-09-15 01:25:45,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:45,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478646450] [2020-09-15 01:25:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:46,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478646450] [2020-09-15 01:25:46,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675915645] [2020-09-15 01:25:46,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:46,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:25:46,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:46,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:46,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:46,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:46,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:46,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:46,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023787630] [2020-09-15 01:25:46,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:46,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:46,572 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:49,202 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-15 01:25:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:25:49,204 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:49,204 INFO L225 Difference]: With dead ends: 119 [2020-09-15 01:25:49,204 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:25:49,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:25:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:25:49,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-09-15 01:25:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:49,212 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:49,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:49,212 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:49,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:49,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:49,213 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:49,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-15 01:25:49,414 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:49,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:49,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-09-15 01:25:49,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:49,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014326736] [2020-09-15 01:25:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:50,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014326736] [2020-09-15 01:25:50,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416491457] [2020-09-15 01:25:50,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:50,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 01:25:50,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:50,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:50,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:50,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:50,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:50,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796657733] [2020-09-15 01:25:50,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:50,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:50,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:50,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:50,149 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:52,373 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-09-15 01:25:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:25:52,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:52,376 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:25:52,376 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 01:25:52,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:25:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 01:25:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-09-15 01:25:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:25:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:25:52,379 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-15 01:25:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:52,379 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:25:52,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:25:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:52,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:52,379 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:52,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:52,580 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-09-15 01:25:52,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:52,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322998786] [2020-09-15 01:25:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:53,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322998786] [2020-09-15 01:25:53,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754127080] [2020-09-15 01:25:53,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:53,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:25:53,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:53,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:25:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:53,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:53,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:25:53,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974388695] [2020-09-15 01:25:53,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:25:53,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:25:53,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:25:53,322 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-15 01:25:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:56,025 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-09-15 01:25:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:25:56,027 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:25:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:56,027 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:25:56,027 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:25:56,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 01:25:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:25:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-09-15 01:25:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:25:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:25:56,030 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-15 01:25:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:56,030 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:25:56,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:25:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:25:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:56,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:56,031 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:56,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-09-15 01:25:56,232 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:56,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-09-15 01:25:56,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:56,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667678096] [2020-09-15 01:25:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:25:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:56,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667678096] [2020-09-15 01:25:56,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337712845] [2020-09-15 01:25:56,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:56,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 01:25:56,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:25:56,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:25:56,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:25:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:25:56,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:25:56,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 01:25:56,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98140225] [2020-09-15 01:25:56,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 01:25:56,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:25:56,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 01:25:56,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:25:56,916 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-15 01:25:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:25:59,260 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-09-15 01:25:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:25:59,262 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-15 01:25:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:25:59,262 INFO L225 Difference]: With dead ends: 131 [2020-09-15 01:25:59,263 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:25:59,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:25:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:25:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-09-15 01:25:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 01:25:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-09-15 01:25:59,265 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-09-15 01:25:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:25:59,265 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-09-15 01:25:59,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 01:25:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-09-15 01:25:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:25:59,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:25:59,266 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:25:59,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:25:59,466 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:25:59,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:25:59,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-09-15 01:25:59,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:25:59,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496654606] [2020-09-15 01:25:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:25:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:00,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496654606] [2020-09-15 01:26:00,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989839769] [2020-09-15 01:26:00,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:00,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 01:26:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:26:00,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:00,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:00,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:00,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:26:00,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115702984] [2020-09-15 01:26:00,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:00,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:00,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:00,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:00,197 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-09-15 01:26:03,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:03,226 INFO L93 Difference]: Finished difference Result 112 states and 281 transitions. [2020-09-15 01:26:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 01:26:03,228 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:26:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:03,228 INFO L225 Difference]: With dead ends: 112 [2020-09-15 01:26:03,229 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 01:26:03,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 01:26:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 01:26:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-09-15 01:26:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 01:26:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-09-15 01:26:03,231 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-09-15 01:26:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:03,231 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-09-15 01:26:03,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-09-15 01:26:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 01:26:03,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:03,232 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:03,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:03,432 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:03,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-09-15 01:26:03,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:03,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028804952] [2020-09-15 01:26:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:04,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028804952] [2020-09-15 01:26:04,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938472885] [2020-09-15 01:26:04,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 01:26:04,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:04,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:26:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:04,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:04,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-15 01:26:04,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557534926] [2020-09-15 01:26:04,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:04,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:04,190 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-09-15 01:26:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:07,054 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-09-15 01:26:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:26:07,055 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 01:26:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:07,056 INFO L225 Difference]: With dead ends: 132 [2020-09-15 01:26:07,056 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:26:07,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 01:26:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:26:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-09-15 01:26:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:26:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-09-15 01:26:07,058 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-09-15 01:26:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:07,058 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-09-15 01:26:07,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-09-15 01:26:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:07,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:07,059 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:07,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:07,260 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:07,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:07,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-09-15 01:26:07,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:07,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318906307] [2020-09-15 01:26:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:07,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318906307] [2020-09-15 01:26:07,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563343584] [2020-09-15 01:26:07,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:08,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:26:08,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:08,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:08,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:26:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:08,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:08,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:08,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72347592] [2020-09-15 01:26:08,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:08,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:08,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:08,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:08,132 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-09-15 01:26:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:11,052 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-09-15 01:26:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:26:11,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:11,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:11,054 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:26:11,055 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 01:26:11,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 01:26:11,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 01:26:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-09-15 01:26:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 01:26:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-15 01:26:11,057 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-09-15 01:26:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:11,057 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-15 01:26:11,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-15 01:26:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:11,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:11,058 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:11,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:11,259 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-09-15 01:26:11,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:11,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95208501] [2020-09-15 01:26:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:12,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95208501] [2020-09-15 01:26:12,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596021210] [2020-09-15 01:26:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:12,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:26:12,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:12,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:12,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:12,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:12,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:12,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011156143] [2020-09-15 01:26:12,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:12,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:12,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:12,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:12,118 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-09-15 01:26:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:13,331 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-09-15 01:26:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:26:13,332 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:13,333 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:26:13,333 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:26:13,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:26:13,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:26:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-09-15 01:26:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:26:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-09-15 01:26:13,335 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-09-15 01:26:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:13,336 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-09-15 01:26:13,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-09-15 01:26:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:13,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:13,336 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:13,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:13,543 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:13,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-09-15 01:26:13,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:13,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218249940] [2020-09-15 01:26:13,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:14,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218249940] [2020-09-15 01:26:14,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779037659] [2020-09-15 01:26:14,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:14,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:26:14,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:14,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:14,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:14,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:14,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:14,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:14,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574614319] [2020-09-15 01:26:14,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:14,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:14,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:14,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:14,482 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-09-15 01:26:15,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:15,881 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-09-15 01:26:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:26:15,883 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:15,883 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:26:15,883 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 01:26:15,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:26:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 01:26:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-09-15 01:26:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 01:26:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-09-15 01:26:15,885 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-09-15 01:26:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:15,886 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-09-15 01:26:15,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-09-15 01:26:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:15,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:15,886 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:16,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-15 01:26:16,087 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:16,087 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-09-15 01:26:16,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:16,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095450094] [2020-09-15 01:26:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:16,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095450094] [2020-09-15 01:26:16,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816378512] [2020-09-15 01:26:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:16,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:26:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:16,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:16,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:16,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452576044] [2020-09-15 01:26:16,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:16,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:16,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:16,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:16,999 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-09-15 01:26:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:18,445 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-09-15 01:26:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:26:18,447 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:18,448 INFO L225 Difference]: With dead ends: 139 [2020-09-15 01:26:18,448 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:26:18,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:26:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:26:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-09-15 01:26:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:26:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-09-15 01:26:18,451 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-09-15 01:26:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:18,451 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-09-15 01:26:18,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-09-15 01:26:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:18,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:18,452 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:18,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-15 01:26:18,653 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-09-15 01:26:18,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:18,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807088755] [2020-09-15 01:26:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:19,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807088755] [2020-09-15 01:26:19,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833201754] [2020-09-15 01:26:19,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:19,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:26:19,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:19,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:19,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:19,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:19,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087587595] [2020-09-15 01:26:19,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:19,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:19,689 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-09-15 01:26:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:21,226 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-09-15 01:26:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:26:21,228 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:21,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:21,228 INFO L225 Difference]: With dead ends: 159 [2020-09-15 01:26:21,228 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 01:26:21,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:26:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 01:26:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-09-15 01:26:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:26:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-09-15 01:26:21,231 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-09-15 01:26:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:21,231 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-09-15 01:26:21,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-09-15 01:26:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:21,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:21,232 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:21,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-15 01:26:21,432 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:21,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:21,433 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-09-15 01:26:21,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:21,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027876393] [2020-09-15 01:26:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:22,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027876393] [2020-09-15 01:26:22,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629584143] [2020-09-15 01:26:22,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:22,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:22,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:22,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:22,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710999586] [2020-09-15 01:26:22,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:22,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:22,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:22,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:22,313 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-09-15 01:26:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:23,838 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-09-15 01:26:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:26:23,840 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:23,840 INFO L225 Difference]: With dead ends: 159 [2020-09-15 01:26:23,840 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 01:26:23,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:26:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 01:26:23,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-09-15 01:26:23,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 01:26:23,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-09-15 01:26:23,843 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-09-15 01:26:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:23,843 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-09-15 01:26:23,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:23,843 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-09-15 01:26:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:23,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:23,843 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:24,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:24,044 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:24,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-09-15 01:26:24,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:24,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612060689] [2020-09-15 01:26:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:24,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612060689] [2020-09-15 01:26:24,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554082392] [2020-09-15 01:26:24,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:24,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:26:24,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:24,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:24,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:24,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:24,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617468662] [2020-09-15 01:26:24,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:24,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:24,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:24,929 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-09-15 01:26:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:26,548 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-09-15 01:26:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:26:26,549 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:26,550 INFO L225 Difference]: With dead ends: 156 [2020-09-15 01:26:26,550 INFO L226 Difference]: Without dead ends: 150 [2020-09-15 01:26:26,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:26:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-15 01:26:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-09-15 01:26:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:26:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-09-15 01:26:26,553 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-09-15 01:26:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:26,553 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-09-15 01:26:26,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-09-15 01:26:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:26,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:26,553 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:26,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:26,754 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-09-15 01:26:26,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:26,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481276202] [2020-09-15 01:26:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:27,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481276202] [2020-09-15 01:26:27,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725951418] [2020-09-15 01:26:27,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:27,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:26:27,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:27,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:27,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:27,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:27,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086371757] [2020-09-15 01:26:27,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:27,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:27,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:27,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:27,613 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-09-15 01:26:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:29,358 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-09-15 01:26:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:26:29,360 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:29,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:29,360 INFO L225 Difference]: With dead ends: 157 [2020-09-15 01:26:29,360 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 01:26:29,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:26:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 01:26:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-09-15 01:26:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:26:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-09-15 01:26:29,363 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-09-15 01:26:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:29,363 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-09-15 01:26:29,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-09-15 01:26:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:29,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:29,364 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:29,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:29,565 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-09-15 01:26:29,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:29,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659592489] [2020-09-15 01:26:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:30,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659592489] [2020-09-15 01:26:30,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784882750] [2020-09-15 01:26:30,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:30,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:26:30,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:30,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:30,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:30,427 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:30,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:30,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:30,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267399566] [2020-09-15 01:26:30,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:30,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:30,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:30,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:30,451 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-09-15 01:26:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:32,488 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-09-15 01:26:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:26:32,490 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:32,490 INFO L225 Difference]: With dead ends: 154 [2020-09-15 01:26:32,490 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:26:32,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:26:32,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:26:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-09-15 01:26:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:26:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-09-15 01:26:32,493 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-09-15 01:26:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:32,494 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-09-15 01:26:32,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-09-15 01:26:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:32,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:32,494 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:32,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-09-15 01:26:32,697 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-09-15 01:26:32,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:32,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960011497] [2020-09-15 01:26:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:33,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960011497] [2020-09-15 01:26:33,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066035138] [2020-09-15 01:26:33,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:33,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:26:33,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:33,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:33,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:33,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:33,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:33,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963323048] [2020-09-15 01:26:33,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:33,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:33,515 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-09-15 01:26:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:35,372 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-09-15 01:26:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:26:35,374 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:35,375 INFO L225 Difference]: With dead ends: 155 [2020-09-15 01:26:35,375 INFO L226 Difference]: Without dead ends: 149 [2020-09-15 01:26:35,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:26:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-15 01:26:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-09-15 01:26:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 01:26:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-09-15 01:26:35,378 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-09-15 01:26:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:35,378 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-09-15 01:26:35,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-09-15 01:26:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:35,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:35,379 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:35,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:35,587 INFO L427 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-09-15 01:26:35,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:35,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278168917] [2020-09-15 01:26:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:36,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278168917] [2020-09-15 01:26:36,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671863476] [2020-09-15 01:26:36,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:36,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:26:36,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:36,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:36,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:36,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:36,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:36,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:36,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108723718] [2020-09-15 01:26:36,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:36,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:36,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:36,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:36,445 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-09-15 01:26:38,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:38,436 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-09-15 01:26:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:26:38,438 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:38,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:38,439 INFO L225 Difference]: With dead ends: 152 [2020-09-15 01:26:38,439 INFO L226 Difference]: Without dead ends: 146 [2020-09-15 01:26:38,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:26:38,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-15 01:26:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-09-15 01:26:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:26:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-09-15 01:26:38,441 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-09-15 01:26:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:38,441 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-09-15 01:26:38,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-09-15 01:26:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:38,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:38,442 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:38,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:38,642 INFO L427 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:38,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:38,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-09-15 01:26:38,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:38,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569827279] [2020-09-15 01:26:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:39,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569827279] [2020-09-15 01:26:39,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569566520] [2020-09-15 01:26:39,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:39,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:39,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:39,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:39,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601512298] [2020-09-15 01:26:39,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:39,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:39,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:39,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:39,432 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-09-15 01:26:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:41,431 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-09-15 01:26:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:26:41,433 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:41,434 INFO L225 Difference]: With dead ends: 153 [2020-09-15 01:26:41,434 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:26:41,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:26:41,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:26:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-09-15 01:26:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:26:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-09-15 01:26:41,437 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-09-15 01:26:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:41,437 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-09-15 01:26:41,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-09-15 01:26:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:41,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:41,438 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:41,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:41,638 INFO L427 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-09-15 01:26:41,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:41,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189152574] [2020-09-15 01:26:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:42,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189152574] [2020-09-15 01:26:42,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891203838] [2020-09-15 01:26:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:42,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:26:42,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:42,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:42,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:42,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:42,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:42,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551439507] [2020-09-15 01:26:42,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:42,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:42,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:42,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:42,511 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-09-15 01:26:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:44,809 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-09-15 01:26:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:26:44,811 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:44,811 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:26:44,812 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:26:44,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:26:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:26:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-09-15 01:26:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 01:26:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-09-15 01:26:44,814 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-09-15 01:26:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:44,814 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-09-15 01:26:44,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-09-15 01:26:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:44,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:44,815 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:45,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:45,016 INFO L427 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:45,016 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-09-15 01:26:45,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:45,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453774137] [2020-09-15 01:26:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:45,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453774137] [2020-09-15 01:26:45,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628312597] [2020-09-15 01:26:45,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:45,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:26:45,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:45,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:45,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:45,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132268136] [2020-09-15 01:26:45,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:45,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:45,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:45,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:45,829 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-09-15 01:26:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:48,006 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-09-15 01:26:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:26:48,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:48,008 INFO L225 Difference]: With dead ends: 151 [2020-09-15 01:26:48,008 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 01:26:48,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:26:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 01:26:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-09-15 01:26:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:26:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-09-15 01:26:48,011 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-09-15 01:26:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:48,012 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-09-15 01:26:48,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-09-15 01:26:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:48,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:48,012 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:48,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:48,213 INFO L427 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-09-15 01:26:48,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:48,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038451659] [2020-09-15 01:26:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:48,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038451659] [2020-09-15 01:26:48,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904350031] [2020-09-15 01:26:48,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:48,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:26:48,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:48,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:49,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:49,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:49,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:49,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632157033] [2020-09-15 01:26:49,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:49,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:49,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:49,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:49,053 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-09-15 01:26:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:51,373 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-09-15 01:26:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:26:51,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:51,374 INFO L225 Difference]: With dead ends: 148 [2020-09-15 01:26:51,375 INFO L226 Difference]: Without dead ends: 142 [2020-09-15 01:26:51,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:26:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-15 01:26:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-09-15 01:26:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:26:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-09-15 01:26:51,378 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-09-15 01:26:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:51,379 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-09-15 01:26:51,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-09-15 01:26:51,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:51,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:51,379 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:51,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-09-15 01:26:51,588 INFO L427 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-09-15 01:26:51,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:51,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536867447] [2020-09-15 01:26:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:52,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536867447] [2020-09-15 01:26:52,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12843531] [2020-09-15 01:26:52,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:52,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:26:52,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:52,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:52,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:52,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:52,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790817432] [2020-09-15 01:26:52,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:52,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:52,360 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-09-15 01:26:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:54,590 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-09-15 01:26:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:26:54,591 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:26:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:54,592 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:26:54,592 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:26:54,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:26:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:26:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-09-15 01:26:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 01:26:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-09-15 01:26:54,595 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-09-15 01:26:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:54,596 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-09-15 01:26:54,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:26:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-09-15 01:26:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:54,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:54,596 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:54,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-09-15 01:26:54,797 INFO L427 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:54,798 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-09-15 01:26:54,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:54,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796390879] [2020-09-15 01:26:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:55,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796390879] [2020-09-15 01:26:55,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009329511] [2020-09-15 01:26:55,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:55,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:26:55,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:26:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:55,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:26:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:55,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:55,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:26:55,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628949633] [2020-09-15 01:26:55,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:26:55,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:26:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:26:55,652 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-09-15 01:26:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:26:58,392 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-09-15 01:26:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:26:58,394 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:26:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:26:58,395 INFO L225 Difference]: With dead ends: 146 [2020-09-15 01:26:58,395 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:26:58,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:26:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:26:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-09-15 01:26:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:26:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-09-15 01:26:58,398 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-09-15 01:26:58,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:26:58,398 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-09-15 01:26:58,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:26:58,398 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-09-15 01:26:58,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:26:58,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:26:58,403 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:26:58,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-09-15 01:26:58,604 INFO L427 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:26:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:26:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-09-15 01:26:58,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:26:58,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15068874] [2020-09-15 01:26:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:26:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:59,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15068874] [2020-09-15 01:26:59,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496663830] [2020-09-15 01:26:59,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:26:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:26:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:26:59,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:26:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:26:59,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:26:59,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:26:59,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450113339] [2020-09-15 01:26:59,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:26:59,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:26:59,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:26:59,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:26:59,469 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-09-15 01:27:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:01,931 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-09-15 01:27:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:27:01,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:27:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:01,934 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:27:01,934 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:27:01,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:27:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:27:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-09-15 01:27:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 01:27:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-09-15 01:27:01,937 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-09-15 01:27:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:01,938 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-09-15 01:27:01,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:27:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-09-15 01:27:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:01,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:01,938 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:02,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:02,139 INFO L427 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:02,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-09-15 01:27:02,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:02,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243811781] [2020-09-15 01:27:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:02,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243811781] [2020-09-15 01:27:02,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723743293] [2020-09-15 01:27:02,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:02,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:27:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:02,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:02,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:02,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:02,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:27:02,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868744981] [2020-09-15 01:27:02,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:02,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:02,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:02,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:02,970 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-09-15 01:27:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:05,785 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-09-15 01:27:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:27:05,788 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:27:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:05,788 INFO L225 Difference]: With dead ends: 144 [2020-09-15 01:27:05,788 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:27:05,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:27:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:27:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-09-15 01:27:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 01:27:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-09-15 01:27:05,790 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-09-15 01:27:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:05,790 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-09-15 01:27:05,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-09-15 01:27:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:05,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:05,791 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:05,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-09-15 01:27:05,991 INFO L427 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:05,992 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-09-15 01:27:05,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:05,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92780278] [2020-09-15 01:27:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:06,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92780278] [2020-09-15 01:27:06,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927379948] [2020-09-15 01:27:06,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:06,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:27:06,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:06,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:06,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:06,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:06,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:27:06,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962507985] [2020-09-15 01:27:06,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:27:06,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:27:06,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:27:06,801 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-09-15 01:27:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:09,424 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-09-15 01:27:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:27:09,426 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:27:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:09,426 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:27:09,426 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 01:27:09,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 01:27:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 01:27:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-09-15 01:27:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:27:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-15 01:27:09,429 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-09-15 01:27:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:09,429 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-15 01:27:09,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:27:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-15 01:27:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:09,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:09,430 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:09,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:09,631 INFO L427 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-09-15 01:27:09,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:09,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721399082] [2020-09-15 01:27:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:10,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721399082] [2020-09-15 01:27:10,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933556157] [2020-09-15 01:27:10,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:10,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:27:10,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:10,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:10,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:10,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:27:10,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117837022] [2020-09-15 01:27:10,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:10,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:10,533 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-09-15 01:27:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:13,534 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-09-15 01:27:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:27:13,536 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:27:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:13,536 INFO L225 Difference]: With dead ends: 142 [2020-09-15 01:27:13,536 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:27:13,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 01:27:13,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:27:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-09-15 01:27:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:27:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-15 01:27:13,539 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-09-15 01:27:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:13,539 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-15 01:27:13,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-15 01:27:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:13,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:13,540 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:13,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-09-15 01:27:13,741 INFO L427 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:13,741 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-09-15 01:27:13,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:13,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542033061] [2020-09-15 01:27:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:14,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542033061] [2020-09-15 01:27:14,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725205139] [2020-09-15 01:27:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:14,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:27:14,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:14,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:14,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:14,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:27:14,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548705133] [2020-09-15 01:27:14,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:27:14,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:27:14,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:27:14,538 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-09-15 01:27:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:17,241 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-09-15 01:27:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-15 01:27:17,243 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:27:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:17,244 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:27:17,244 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 01:27:17,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 01:27:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 01:27:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-09-15 01:27:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:27:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-09-15 01:27:17,246 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-09-15 01:27:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:17,247 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-09-15 01:27:17,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:27:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-09-15 01:27:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:17,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:17,247 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:17,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:17,448 INFO L427 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:17,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:17,448 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-09-15 01:27:17,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:17,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493714091] [2020-09-15 01:27:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:18,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493714091] [2020-09-15 01:27:18,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956323216] [2020-09-15 01:27:18,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:18,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:27:18,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:18,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:18,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:18,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:18,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:18,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:27:18,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414626936] [2020-09-15 01:27:18,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:18,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:18,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:18,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:18,303 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-09-15 01:27:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:21,596 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-09-15 01:27:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 01:27:21,598 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:27:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:21,598 INFO L225 Difference]: With dead ends: 140 [2020-09-15 01:27:21,598 INFO L226 Difference]: Without dead ends: 134 [2020-09-15 01:27:21,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 01:27:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-15 01:27:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-09-15 01:27:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:27:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-09-15 01:27:21,601 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-09-15 01:27:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:21,602 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-09-15 01:27:21,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-09-15 01:27:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:21,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:21,602 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:21,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:21,803 INFO L427 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-09-15 01:27:21,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:21,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127605699] [2020-09-15 01:27:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:22,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127605699] [2020-09-15 01:27:22,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895440372] [2020-09-15 01:27:22,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:22,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:22,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:22,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:22,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 01:27:22,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779016688] [2020-09-15 01:27:22,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 01:27:22,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:22,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 01:27:22,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:27:22,608 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-09-15 01:27:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:25,509 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-09-15 01:27:25,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:27:25,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-15 01:27:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:25,511 INFO L225 Difference]: With dead ends: 160 [2020-09-15 01:27:25,511 INFO L226 Difference]: Without dead ends: 154 [2020-09-15 01:27:25,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 01:27:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-15 01:27:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-09-15 01:27:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 01:27:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-09-15 01:27:25,514 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-09-15 01:27:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:25,514 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-09-15 01:27:25,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 01:27:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-09-15 01:27:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 01:27:25,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:25,515 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:25,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-09-15 01:27:25,715 INFO L427 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:25,716 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-09-15 01:27:25,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:25,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891794496] [2020-09-15 01:27:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:26,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891794496] [2020-09-15 01:27:26,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234837959] [2020-09-15 01:27:26,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:26,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:27:26,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 01:27:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:26,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:26,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:26,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-15 01:27:26,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899677148] [2020-09-15 01:27:26,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:26,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:26,605 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-09-15 01:27:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:29,924 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-09-15 01:27:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 01:27:29,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 01:27:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:29,926 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:27:29,926 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:27:29,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1723, Invalid=3827, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 01:27:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:27:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-09-15 01:27:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 01:27:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-09-15 01:27:29,928 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-09-15 01:27:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:29,928 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-09-15 01:27:29,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-09-15 01:27:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:29,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:29,929 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:30,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:30,130 INFO L427 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:30,130 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-09-15 01:27:30,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:30,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116790728] [2020-09-15 01:27:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:31,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116790728] [2020-09-15 01:27:31,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874983134] [2020-09-15 01:27:31,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:31,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:27:31,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:31,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:31,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:31,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:31,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835965984] [2020-09-15 01:27:31,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:31,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:31,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:31,201 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-09-15 01:27:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:32,600 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-09-15 01:27:32,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:27:32,602 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:32,603 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:27:32,603 INFO L226 Difference]: Without dead ends: 158 [2020-09-15 01:27:32,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 01:27:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-15 01:27:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-09-15 01:27:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:32,605 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:32,605 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:32,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:32,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:32,606 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:32,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-09-15 01:27:32,807 INFO L427 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-09-15 01:27:32,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:32,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846881315] [2020-09-15 01:27:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:33,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846881315] [2020-09-15 01:27:33,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920178107] [2020-09-15 01:27:33,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:33,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:27:33,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:33,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:33,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:33,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:33,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:27:33,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529022921] [2020-09-15 01:27:33,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:27:33,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:33,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:27:33,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:27:33,898 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:27:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:35,707 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-09-15 01:27:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:27:35,710 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:27:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:35,710 INFO L225 Difference]: With dead ends: 161 [2020-09-15 01:27:35,710 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 01:27:35,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:27:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 01:27:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-09-15 01:27:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:27:35,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:27:35,713 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:27:35,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:35,713 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:27:35,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:27:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:27:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:35,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:35,713 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:35,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-09-15 01:27:35,914 INFO L427 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-09-15 01:27:35,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:35,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322585759] [2020-09-15 01:27:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:36,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322585759] [2020-09-15 01:27:36,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173981044] [2020-09-15 01:27:36,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:36,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:27:36,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:36,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:36,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:36,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:36,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338959828] [2020-09-15 01:27:36,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:36,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:36,965 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:27:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:38,585 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-09-15 01:27:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:27:38,587 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:38,588 INFO L225 Difference]: With dead ends: 158 [2020-09-15 01:27:38,588 INFO L226 Difference]: Without dead ends: 152 [2020-09-15 01:27:38,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 01:27:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-15 01:27:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-09-15 01:27:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:38,590 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:38,590 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:38,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:38,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:38,591 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:38,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-09-15 01:27:38,792 INFO L427 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:38,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-09-15 01:27:38,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:38,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755843664] [2020-09-15 01:27:38,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:39,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755843664] [2020-09-15 01:27:39,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647302157] [2020-09-15 01:27:39,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:39,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:27:39,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:39,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:39,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:39,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:39,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:39,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:27:39,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379533913] [2020-09-15 01:27:39,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:27:39,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:39,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:27:39,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:27:39,999 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:27:42,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:42,011 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-09-15 01:27:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:27:42,013 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:27:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:42,014 INFO L225 Difference]: With dead ends: 157 [2020-09-15 01:27:42,014 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 01:27:42,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 01:27:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 01:27:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-09-15 01:27:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:27:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:27:42,017 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:27:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:42,017 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:27:42,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:27:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:27:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:42,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:42,018 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:42,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-09-15 01:27:42,219 INFO L427 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:42,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:42,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-09-15 01:27:42,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:42,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404432809] [2020-09-15 01:27:42,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:43,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404432809] [2020-09-15 01:27:43,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427471557] [2020-09-15 01:27:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:43,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:43,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:43,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:43,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16875978] [2020-09-15 01:27:43,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:43,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:43,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:43,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:43,324 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:27:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:45,270 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-09-15 01:27:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:27:45,272 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:45,272 INFO L225 Difference]: With dead ends: 154 [2020-09-15 01:27:45,272 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:27:45,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:27:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:27:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-09-15 01:27:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:45,275 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:45,275 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:45,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:45,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:45,276 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:45,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:45,477 INFO L427 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:45,477 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-09-15 01:27:45,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:45,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93802864] [2020-09-15 01:27:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:46,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93802864] [2020-09-15 01:27:46,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589192230] [2020-09-15 01:27:46,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:46,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:27:46,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:46,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:46,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:46,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:27:46,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510744973] [2020-09-15 01:27:46,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:27:46,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:46,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:27:46,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:27:46,573 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:27:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:48,908 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-09-15 01:27:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:27:48,910 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:27:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:48,911 INFO L225 Difference]: With dead ends: 153 [2020-09-15 01:27:48,911 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:27:48,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:27:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:27:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-09-15 01:27:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:27:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:27:48,913 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:27:48,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:48,913 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:27:48,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:27:48,914 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:27:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:48,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:48,914 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:49,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-09-15 01:27:49,115 INFO L427 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-09-15 01:27:49,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:49,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749424843] [2020-09-15 01:27:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:49,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749424843] [2020-09-15 01:27:49,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824233115] [2020-09-15 01:27:49,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:50,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:27:50,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:50,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:50,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:50,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:50,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:50,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521977540] [2020-09-15 01:27:50,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:50,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:50,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:50,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:50,074 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:27:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:52,192 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-09-15 01:27:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:27:52,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:52,195 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:27:52,195 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:27:52,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:27:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:27:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-09-15 01:27:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:52,197 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:52,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:52,198 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:52,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:52,198 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:52,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:52,198 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:52,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-09-15 01:27:52,399 INFO L427 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-09-15 01:27:52,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:52,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762417787] [2020-09-15 01:27:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:53,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762417787] [2020-09-15 01:27:53,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996881142] [2020-09-15 01:27:53,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:53,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:27:53,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:53,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:53,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:53,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:27:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:53,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:53,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:27:53,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958051105] [2020-09-15 01:27:53,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:27:53,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:27:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:27:53,390 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:27:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:55,674 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-09-15 01:27:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:27:55,676 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:27:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:55,676 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:27:55,676 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:27:55,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:27:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:27:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-09-15 01:27:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:27:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:27:55,679 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:27:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:55,679 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:27:55,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:27:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:27:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:55,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:55,680 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:55,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-09-15 01:27:55,881 INFO L427 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:55,881 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-09-15 01:27:55,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:55,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352215731] [2020-09-15 01:27:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:56,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352215731] [2020-09-15 01:27:56,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156944947] [2020-09-15 01:27:56,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:56,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:27:56,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:27:56,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:27:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:27:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:56,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:27:56,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:27:56,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052640225] [2020-09-15 01:27:56,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:27:56,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:27:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:27:56,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:27:56,836 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:27:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:27:58,900 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-09-15 01:27:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:27:58,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:27:58,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:27:58,903 INFO L225 Difference]: With dead ends: 146 [2020-09-15 01:27:58,903 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:27:58,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:27:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:27:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-09-15 01:27:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:27:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:27:58,906 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:27:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:27:58,907 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:27:58,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:27:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:27:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:27:58,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:27:58,907 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:27:59,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:27:59,108 INFO L427 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:27:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:27:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-09-15 01:27:59,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:27:59,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974937345] [2020-09-15 01:27:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:27:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:27:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:27:59,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974937345] [2020-09-15 01:27:59,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881779213] [2020-09-15 01:27:59,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:00,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:28:00,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:00,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:00,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:00,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:00,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:00,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787857665] [2020-09-15 01:28:00,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:00,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:00,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:00,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:00,133 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:02,794 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-09-15 01:28:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:28:02,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:02,797 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:28:02,797 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 01:28:02,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:28:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 01:28:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-09-15 01:28:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:02,799 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:02,800 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:02,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:02,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:02,800 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:03,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:03,001 INFO L427 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:03,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:03,002 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-09-15 01:28:03,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:03,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501269354] [2020-09-15 01:28:03,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:03,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501269354] [2020-09-15 01:28:03,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775063681] [2020-09-15 01:28:03,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:04,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:04,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:04,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763912207] [2020-09-15 01:28:04,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:04,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:04,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:04,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:04,021 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:06,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:06,496 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-09-15 01:28:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:28:06,499 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:06,499 INFO L225 Difference]: With dead ends: 142 [2020-09-15 01:28:06,499 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:28:06,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:28:06,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:28:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-09-15 01:28:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:06,502 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:06,502 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:06,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:06,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:06,502 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:06,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-09-15 01:28:06,703 INFO L427 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:06,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:06,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-09-15 01:28:06,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:06,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851181155] [2020-09-15 01:28:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:07,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851181155] [2020-09-15 01:28:07,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625327143] [2020-09-15 01:28:07,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:07,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:28:07,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:07,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:07,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:07,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:07,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:07,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296368870] [2020-09-15 01:28:07,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:07,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:07,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:07,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:07,693 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:10,628 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-09-15 01:28:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:28:10,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:10,631 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:28:10,631 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 01:28:10,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:28:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 01:28:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-09-15 01:28:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:10,633 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:10,633 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:10,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:10,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:10,634 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:10,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-09-15 01:28:10,835 INFO L427 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:10,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-09-15 01:28:10,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:10,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505503906] [2020-09-15 01:28:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:11,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505503906] [2020-09-15 01:28:11,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081074189] [2020-09-15 01:28:11,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:11,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:28:11,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:11,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:11,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:11,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:11,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336460490] [2020-09-15 01:28:11,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:11,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:11,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:11,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:11,781 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:14,273 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-09-15 01:28:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:28:14,275 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:14,276 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:28:14,276 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 01:28:14,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:28:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 01:28:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-09-15 01:28:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:14,279 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:14,279 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:14,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:14,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:14,280 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:14,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-09-15 01:28:14,481 INFO L427 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-09-15 01:28:14,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:14,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742098064] [2020-09-15 01:28:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:15,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742098064] [2020-09-15 01:28:15,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796393259] [2020-09-15 01:28:15,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:15,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:28:15,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:15,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:15,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:15,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:15,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:15,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:15,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996884824] [2020-09-15 01:28:15,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:15,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:15,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:15,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:15,494 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:18,497 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-09-15 01:28:18,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:28:18,500 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:18,500 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:28:18,500 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:28:18,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:28:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:28:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-09-15 01:28:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:18,502 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:18,503 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:18,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:18,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:18,503 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:18,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-09-15 01:28:18,704 INFO L427 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-09-15 01:28:18,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:18,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764849538] [2020-09-15 01:28:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:19,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764849538] [2020-09-15 01:28:19,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346345747] [2020-09-15 01:28:19,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:19,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:28:19,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:19,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:19,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:19,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:19,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:19,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265799936] [2020-09-15 01:28:19,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:19,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:19,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:19,630 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:22,351 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-09-15 01:28:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:28:22,353 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:22,354 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:28:22,354 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:28:22,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:28:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:28:22,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-09-15 01:28:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:22,356 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:22,357 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:22,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:22,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:22,357 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:22,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:22,558 INFO L427 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-09-15 01:28:22,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:22,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691262937] [2020-09-15 01:28:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:23,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691262937] [2020-09-15 01:28:23,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906982839] [2020-09-15 01:28:23,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:23,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:28:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:23,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:23,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:23,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:23,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:23,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200871117] [2020-09-15 01:28:23,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:23,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:23,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:23,562 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:26,815 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-09-15 01:28:26,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:28:26,818 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:26,818 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:28:26,818 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 01:28:26,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 01:28:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 01:28:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-09-15 01:28:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:26,821 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:26,822 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:26,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:26,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:26,822 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:27,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-09-15 01:28:27,023 INFO L427 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:27,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:27,024 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-09-15 01:28:27,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:27,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955504678] [2020-09-15 01:28:27,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:27,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955504678] [2020-09-15 01:28:27,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852951370] [2020-09-15 01:28:27,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:27,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:27,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:27,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:27,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848852075] [2020-09-15 01:28:27,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:27,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:27,998 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:30,845 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-09-15 01:28:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:28:30,847 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:30,848 INFO L225 Difference]: With dead ends: 130 [2020-09-15 01:28:30,848 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:28:30,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:28:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:28:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-09-15 01:28:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:30,851 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:30,851 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:30,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:30,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:30,851 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:31,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:31,052 INFO L427 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-09-15 01:28:31,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:31,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740349164] [2020-09-15 01:28:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:31,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740349164] [2020-09-15 01:28:31,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827159618] [2020-09-15 01:28:31,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:31,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:28:31,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:31,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:31,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:32,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:32,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:32,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506734548] [2020-09-15 01:28:32,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:32,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:32,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:32,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:32,037 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:35,641 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-09-15 01:28:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:28:35,643 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:35,644 INFO L225 Difference]: With dead ends: 129 [2020-09-15 01:28:35,644 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 01:28:35,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 01:28:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 01:28:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-09-15 01:28:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:35,646 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:35,647 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:35,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:35,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:35,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:35,647 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:35,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-09-15 01:28:35,848 INFO L427 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:35,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:35,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-09-15 01:28:35,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:35,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888067614] [2020-09-15 01:28:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:36,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888067614] [2020-09-15 01:28:36,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077271422] [2020-09-15 01:28:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:36,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:28:36,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:36,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:36,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:36,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:36,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:36,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290783076] [2020-09-15 01:28:36,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:36,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:36,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:36,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:36,802 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:39,884 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-09-15 01:28:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:28:39,886 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:39,886 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:28:39,887 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:28:39,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 01:28:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:28:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-09-15 01:28:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:39,889 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:39,890 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:39,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:39,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:39,890 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:40,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:40,091 INFO L427 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:40,092 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-09-15 01:28:40,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:40,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080236153] [2020-09-15 01:28:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:40,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080236153] [2020-09-15 01:28:40,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89364149] [2020-09-15 01:28:40,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:41,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:28:41,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:41,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:41,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:41,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:41,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:41,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:41,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881298536] [2020-09-15 01:28:41,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:41,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:41,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:41,129 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:44,837 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-15 01:28:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 01:28:44,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:44,840 INFO L225 Difference]: With dead ends: 125 [2020-09-15 01:28:44,840 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 01:28:44,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 01:28:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 01:28:44,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-09-15 01:28:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:44,843 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:44,843 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:44,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:44,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:44,844 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:45,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-09-15 01:28:45,044 INFO L427 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:45,045 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-09-15 01:28:45,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:45,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180687790] [2020-09-15 01:28:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:45,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180687790] [2020-09-15 01:28:45,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751137501] [2020-09-15 01:28:45,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:45,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 01:28:45,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:45,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:46,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:46,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:46,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68153483] [2020-09-15 01:28:46,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:46,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:46,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:46,005 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:49,200 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-09-15 01:28:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-15 01:28:49,207 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:49,208 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:28:49,208 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:28:49,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 01:28:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:28:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-09-15 01:28:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:28:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:28:49,210 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-15 01:28:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:49,210 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:28:49,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:28:49,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:49,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:49,212 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:49,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:49,419 INFO L427 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-09-15 01:28:49,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:49,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337825346] [2020-09-15 01:28:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:50,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337825346] [2020-09-15 01:28:50,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761830823] [2020-09-15 01:28:50,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:50,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 01:28:50,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:50,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:28:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:50,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:50,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:28:50,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531255323] [2020-09-15 01:28:50,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:28:50,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:50,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:28:50,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:28:50,400 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-15 01:28:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:54,335 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-09-15 01:28:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 01:28:54,337 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:28:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:54,338 INFO L225 Difference]: With dead ends: 121 [2020-09-15 01:28:54,338 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:28:54,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 01:28:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:28:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-09-15 01:28:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:28:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:28:54,341 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-15 01:28:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:54,342 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:28:54,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:28:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:28:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:54,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:54,342 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:54,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:54,543 INFO L427 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:54,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-09-15 01:28:54,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:54,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393827202] [2020-09-15 01:28:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:55,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393827202] [2020-09-15 01:28:55,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66838766] [2020-09-15 01:28:55,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:55,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:28:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:28:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:55,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:28:55,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 01:28:55,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871863797] [2020-09-15 01:28:55,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 01:28:55,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:28:55,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 01:28:55,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:28:55,494 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-15 01:28:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:28:58,879 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-09-15 01:28:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:28:58,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-15 01:28:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:28:58,882 INFO L225 Difference]: With dead ends: 137 [2020-09-15 01:28:58,882 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:28:58,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 01:28:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:28:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-09-15 01:28:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-15 01:28:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-09-15 01:28:58,885 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-09-15 01:28:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:28:58,885 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-09-15 01:28:58,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 01:28:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-09-15 01:28:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:28:58,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:28:58,886 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:28:59,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-09-15 01:28:59,086 INFO L427 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:28:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:28:59,087 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-09-15 01:28:59,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:28:59,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718062017] [2020-09-15 01:28:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:28:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:28:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:28:59,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718062017] [2020-09-15 01:28:59,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925370983] [2020-09-15 01:28:59,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:28:59,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:28:59,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:28:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:28:59,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:00,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:00,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:29:00,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86319335] [2020-09-15 01:29:00,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:00,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:00,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:00,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:00,092 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-09-15 01:29:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:03,740 INFO L93 Difference]: Finished difference Result 116 states and 293 transitions. [2020-09-15 01:29:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 01:29:03,743 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:29:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:03,743 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:29:03,743 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 01:29:03,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1572, Invalid=4128, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 01:29:03,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 01:29:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2020-09-15 01:29:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 01:29:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-09-15 01:29:03,745 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-09-15 01:29:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:03,745 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-09-15 01:29:03,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-09-15 01:29:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 01:29:03,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:03,746 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:03,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-09-15 01:29:03,947 INFO L427 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:03,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:03,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-09-15 01:29:03,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:03,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079974319] [2020-09-15 01:29:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:04,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079974319] [2020-09-15 01:29:04,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165424957] [2020-09-15 01:29:04,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:04,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 01:29:04,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:04,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 01:29:04,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:04,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:29:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:04,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:04,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-15 01:29:04,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263175933] [2020-09-15 01:29:04,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:04,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:04,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:04,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:04,969 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-09-15 01:29:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:08,742 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-09-15 01:29:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:29:08,745 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 01:29:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:08,745 INFO L225 Difference]: With dead ends: 140 [2020-09-15 01:29:08,745 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 01:29:08,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 01:29:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 01:29:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-09-15 01:29:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 01:29:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-09-15 01:29:08,748 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-09-15 01:29:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:08,753 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-09-15 01:29:08,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-09-15 01:29:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:08,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:08,753 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:08,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-09-15 01:29:08,954 INFO L427 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:08,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-09-15 01:29:08,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:08,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796039109] [2020-09-15 01:29:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:09,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796039109] [2020-09-15 01:29:09,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140233750] [2020-09-15 01:29:09,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:09,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:29:09,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:09,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:09,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:10,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:29:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:10,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:10,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:10,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038054843] [2020-09-15 01:29:10,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:10,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:10,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:10,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:10,068 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-09-15 01:29:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:14,126 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-09-15 01:29:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:29:14,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:14,130 INFO L225 Difference]: With dead ends: 114 [2020-09-15 01:29:14,130 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 01:29:14,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-09-15 01:29:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 01:29:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-09-15 01:29:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:29:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-15 01:29:14,132 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-09-15 01:29:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:14,133 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-15 01:29:14,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:14,133 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-15 01:29:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:14,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:14,133 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:14,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:14,334 INFO L427 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-09-15 01:29:14,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:14,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081365082] [2020-09-15 01:29:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:15,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081365082] [2020-09-15 01:29:15,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734754524] [2020-09-15 01:29:15,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:15,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:29:15,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:15,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:15,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:15,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:15,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922335488] [2020-09-15 01:29:15,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:15,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:15,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:15,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:15,551 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-09-15 01:29:17,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:17,262 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-09-15 01:29:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:29:17,265 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:17,265 INFO L225 Difference]: With dead ends: 120 [2020-09-15 01:29:17,265 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 01:29:17,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 01:29:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 01:29:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-09-15 01:29:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:29:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-09-15 01:29:17,268 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-09-15 01:29:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:17,268 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-09-15 01:29:17,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-09-15 01:29:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:17,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:17,268 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:17,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-09-15 01:29:17,469 INFO L427 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-09-15 01:29:17,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:17,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141237608] [2020-09-15 01:29:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:18,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141237608] [2020-09-15 01:29:18,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018008713] [2020-09-15 01:29:18,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:18,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:29:18,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:18,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:18,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:18,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:18,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359010420] [2020-09-15 01:29:18,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:18,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:18,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:18,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:18,769 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-09-15 01:29:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:20,625 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-09-15 01:29:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:29:20,628 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:20,628 INFO L225 Difference]: With dead ends: 146 [2020-09-15 01:29:20,629 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:29:20,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 01:29:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:29:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-09-15 01:29:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 01:29:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-09-15 01:29:20,631 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-09-15 01:29:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:20,631 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-09-15 01:29:20,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-09-15 01:29:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:20,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:20,631 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:20,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:20,832 INFO L427 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-09-15 01:29:20,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:20,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068314697] [2020-09-15 01:29:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:21,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068314697] [2020-09-15 01:29:21,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128520721] [2020-09-15 01:29:21,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:22,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:22,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:22,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:22,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990455932] [2020-09-15 01:29:22,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:22,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:22,056 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-09-15 01:29:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:24,007 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-09-15 01:29:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:29:24,010 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:24,010 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:29:24,010 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:29:24,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:29:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:29:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-09-15 01:29:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 01:29:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-09-15 01:29:24,013 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-09-15 01:29:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:24,013 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-09-15 01:29:24,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-09-15 01:29:24,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:24,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:24,013 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:24,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-09-15 01:29:24,214 INFO L427 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:24,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:24,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-09-15 01:29:24,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:24,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987431490] [2020-09-15 01:29:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:25,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987431490] [2020-09-15 01:29:25,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779907212] [2020-09-15 01:29:25,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:25,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:29:25,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:25,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:25,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:25,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:25,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150878782] [2020-09-15 01:29:25,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:25,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:25,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:25,525 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-09-15 01:29:27,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:27,601 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-09-15 01:29:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:29:27,603 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:27,603 INFO L225 Difference]: With dead ends: 169 [2020-09-15 01:29:27,604 INFO L226 Difference]: Without dead ends: 163 [2020-09-15 01:29:27,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:29:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-15 01:29:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-09-15 01:29:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 01:29:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-09-15 01:29:27,606 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-09-15 01:29:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:27,606 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-09-15 01:29:27,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-09-15 01:29:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:27,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:27,607 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:27,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:27,808 INFO L427 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:27,808 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-09-15 01:29:27,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:27,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677441225] [2020-09-15 01:29:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:28,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677441225] [2020-09-15 01:29:28,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239030464] [2020-09-15 01:29:28,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:28,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:29:28,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:28,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:28,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:29,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:29,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:29,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549785494] [2020-09-15 01:29:29,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:29,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:29,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:29,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:29,001 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-09-15 01:29:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:31,111 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-09-15 01:29:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:29:31,114 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:31,115 INFO L225 Difference]: With dead ends: 169 [2020-09-15 01:29:31,115 INFO L226 Difference]: Without dead ends: 163 [2020-09-15 01:29:31,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:29:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-15 01:29:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-09-15 01:29:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 01:29:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-09-15 01:29:31,117 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-09-15 01:29:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:31,117 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-09-15 01:29:31,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-09-15 01:29:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:31,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:31,117 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:31,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:31,318 INFO L427 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:31,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:31,319 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-09-15 01:29:31,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:31,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270823655] [2020-09-15 01:29:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:32,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270823655] [2020-09-15 01:29:32,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210378830] [2020-09-15 01:29:32,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:32,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:29:32,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:32,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:32,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:32,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:32,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:32,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:32,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161652354] [2020-09-15 01:29:32,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:32,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:32,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:32,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:32,585 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-09-15 01:29:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:34,918 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-09-15 01:29:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:29:34,921 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:34,921 INFO L225 Difference]: With dead ends: 166 [2020-09-15 01:29:34,921 INFO L226 Difference]: Without dead ends: 160 [2020-09-15 01:29:34,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:29:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-15 01:29:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-09-15 01:29:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:29:34,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-09-15 01:29:34,924 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-09-15 01:29:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:34,924 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-09-15 01:29:34,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-09-15 01:29:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:34,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:34,925 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:35,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-09-15 01:29:35,126 INFO L427 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:35,126 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-09-15 01:29:35,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:35,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529710844] [2020-09-15 01:29:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:36,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529710844] [2020-09-15 01:29:36,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253806975] [2020-09-15 01:29:36,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:36,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:29:36,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:36,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:36,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:36,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:36,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769392149] [2020-09-15 01:29:36,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:36,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:36,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:36,295 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-09-15 01:29:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:38,564 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-09-15 01:29:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:29:38,567 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:38,567 INFO L225 Difference]: With dead ends: 167 [2020-09-15 01:29:38,567 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:29:38,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:29:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:29:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-09-15 01:29:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:29:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-09-15 01:29:38,570 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-09-15 01:29:38,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:38,570 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-09-15 01:29:38,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-09-15 01:29:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:38,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:38,571 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:38,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-09-15 01:29:38,771 INFO L427 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:38,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-09-15 01:29:38,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:38,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54659425] [2020-09-15 01:29:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:39,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54659425] [2020-09-15 01:29:39,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355548721] [2020-09-15 01:29:39,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:39,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:29:39,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:39,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:39,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:40,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:40,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:40,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:40,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383193060] [2020-09-15 01:29:40,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:40,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:40,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:40,035 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-09-15 01:29:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:42,584 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-09-15 01:29:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:29:42,587 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:42,587 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:29:42,588 INFO L226 Difference]: Without dead ends: 158 [2020-09-15 01:29:42,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:29:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-15 01:29:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-09-15 01:29:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 01:29:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-09-15 01:29:42,590 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-09-15 01:29:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:42,590 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-09-15 01:29:42,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-09-15 01:29:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:42,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:42,591 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:42,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-09-15 01:29:42,792 INFO L427 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-09-15 01:29:42,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:42,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871626972] [2020-09-15 01:29:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:43,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871626972] [2020-09-15 01:29:43,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972517361] [2020-09-15 01:29:43,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:43,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:43,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:43,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:43,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:43,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794022228] [2020-09-15 01:29:43,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:43,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:43,921 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-09-15 01:29:46,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:46,366 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-09-15 01:29:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 01:29:46,369 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:46,370 INFO L225 Difference]: With dead ends: 165 [2020-09-15 01:29:46,370 INFO L226 Difference]: Without dead ends: 159 [2020-09-15 01:29:46,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:29:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-15 01:29:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-09-15 01:29:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 01:29:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-09-15 01:29:46,372 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-09-15 01:29:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:46,373 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-09-15 01:29:46,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-09-15 01:29:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:46,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:46,373 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:46,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-09-15 01:29:46,574 INFO L427 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-09-15 01:29:46,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:46,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496382460] [2020-09-15 01:29:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:47,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496382460] [2020-09-15 01:29:47,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492418544] [2020-09-15 01:29:47,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:47,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:29:47,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:47,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:47,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:47,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:47,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:47,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:47,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290360772] [2020-09-15 01:29:47,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:47,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:47,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:47,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:47,795 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-09-15 01:29:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:50,590 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-09-15 01:29:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:29:50,594 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:50,594 INFO L225 Difference]: With dead ends: 162 [2020-09-15 01:29:50,595 INFO L226 Difference]: Without dead ends: 156 [2020-09-15 01:29:50,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 01:29:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-15 01:29:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-09-15 01:29:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:29:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-09-15 01:29:50,598 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-09-15 01:29:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:50,598 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-09-15 01:29:50,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-09-15 01:29:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:50,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:50,598 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:50,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-09-15 01:29:50,799 INFO L427 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:50,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-09-15 01:29:50,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:50,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520215873] [2020-09-15 01:29:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:51,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520215873] [2020-09-15 01:29:51,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582830283] [2020-09-15 01:29:51,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:51,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:29:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:51,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:51,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:51,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:51,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:29:51,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49773241] [2020-09-15 01:29:51,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:29:51,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:51,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:29:51,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:29:51,936 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-09-15 01:29:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:54,553 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-09-15 01:29:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-15 01:29:54,556 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:29:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:54,556 INFO L225 Difference]: With dead ends: 163 [2020-09-15 01:29:54,557 INFO L226 Difference]: Without dead ends: 157 [2020-09-15 01:29:54,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:29:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-15 01:29:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-09-15 01:29:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 01:29:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-09-15 01:29:54,564 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-09-15 01:29:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:54,564 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-09-15 01:29:54,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:29:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-09-15 01:29:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:54,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:54,565 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:54,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-09-15 01:29:54,766 INFO L427 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:54,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-09-15 01:29:54,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:54,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561334043] [2020-09-15 01:29:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:29:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:55,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561334043] [2020-09-15 01:29:55,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132774606] [2020-09-15 01:29:55,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:55,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:29:55,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:29:55,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:29:55,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:29:55,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:29:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:29:55,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:29:55,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:29:55,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552915513] [2020-09-15 01:29:55,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:29:55,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:29:55,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:29:55,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:29:55,974 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-09-15 01:29:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:29:59,036 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-09-15 01:29:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:29:59,040 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:29:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:29:59,040 INFO L225 Difference]: With dead ends: 160 [2020-09-15 01:29:59,040 INFO L226 Difference]: Without dead ends: 154 [2020-09-15 01:29:59,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 01:29:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-15 01:29:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-09-15 01:29:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:29:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-09-15 01:29:59,044 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-09-15 01:29:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:29:59,044 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-09-15 01:29:59,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:29:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-09-15 01:29:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:29:59,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:29:59,044 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:29:59,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:29:59,245 INFO L427 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:29:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:29:59,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-09-15 01:29:59,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:29:59,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006883532] [2020-09-15 01:29:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:29:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:00,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006883532] [2020-09-15 01:30:00,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949953325] [2020-09-15 01:30:00,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:00,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:30:00,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:00,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:00,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:00,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537541710] [2020-09-15 01:30:00,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:00,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:00,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:00,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:00,412 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-09-15 01:30:03,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:03,268 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-09-15 01:30:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 01:30:03,271 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:03,272 INFO L225 Difference]: With dead ends: 161 [2020-09-15 01:30:03,272 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 01:30:03,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 01:30:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 01:30:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-09-15 01:30:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 01:30:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-09-15 01:30:03,275 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-09-15 01:30:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:03,275 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-09-15 01:30:03,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-09-15 01:30:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:03,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:03,276 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:03,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-09-15 01:30:03,484 INFO L427 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-09-15 01:30:03,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:03,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646017098] [2020-09-15 01:30:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:04,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646017098] [2020-09-15 01:30:04,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659586490] [2020-09-15 01:30:04,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:04,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:30:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:04,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:04,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:04,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:04,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:04,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:04,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743600922] [2020-09-15 01:30:04,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:04,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:04,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:04,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:04,697 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-09-15 01:30:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:08,014 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-09-15 01:30:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:30:08,017 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:08,018 INFO L225 Difference]: With dead ends: 158 [2020-09-15 01:30:08,018 INFO L226 Difference]: Without dead ends: 152 [2020-09-15 01:30:08,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 01:30:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-15 01:30:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-09-15 01:30:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 01:30:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-09-15 01:30:08,021 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-09-15 01:30:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:08,021 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-09-15 01:30:08,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-09-15 01:30:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:08,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:08,022 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:08,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-09-15 01:30:08,223 INFO L427 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:08,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:08,223 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-09-15 01:30:08,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:08,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821386049] [2020-09-15 01:30:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:09,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821386049] [2020-09-15 01:30:09,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927130617] [2020-09-15 01:30:09,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:09,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:09,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:09,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522196399] [2020-09-15 01:30:09,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:09,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:09,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:09,313 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-09-15 01:30:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:12,338 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-09-15 01:30:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-15 01:30:12,341 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:12,342 INFO L225 Difference]: With dead ends: 159 [2020-09-15 01:30:12,342 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 01:30:12,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 01:30:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 01:30:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-09-15 01:30:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:30:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-09-15 01:30:12,344 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-09-15 01:30:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:12,344 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-09-15 01:30:12,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-09-15 01:30:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:12,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:12,345 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:12,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:12,546 INFO L427 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-09-15 01:30:12,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:12,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149310447] [2020-09-15 01:30:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:13,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149310447] [2020-09-15 01:30:13,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90418716] [2020-09-15 01:30:13,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:13,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:30:13,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:13,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:13,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:13,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:13,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:13,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060540821] [2020-09-15 01:30:13,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:13,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:13,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:13,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:13,720 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-09-15 01:30:17,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:17,401 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-09-15 01:30:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 01:30:17,404 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:17,405 INFO L225 Difference]: With dead ends: 156 [2020-09-15 01:30:17,405 INFO L226 Difference]: Without dead ends: 150 [2020-09-15 01:30:17,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 01:30:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-15 01:30:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-09-15 01:30:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:30:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-09-15 01:30:17,408 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-09-15 01:30:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:17,408 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-09-15 01:30:17,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-09-15 01:30:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:17,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:17,409 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:17,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:17,609 INFO L427 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:17,610 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-09-15 01:30:17,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:17,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960196182] [2020-09-15 01:30:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:18,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960196182] [2020-09-15 01:30:18,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727904965] [2020-09-15 01:30:18,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:18,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:30:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:18,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:18,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:18,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:18,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:18,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320250002] [2020-09-15 01:30:18,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:18,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:18,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:18,717 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-09-15 01:30:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:21,901 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-09-15 01:30:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 01:30:21,904 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:21,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:21,905 INFO L225 Difference]: With dead ends: 157 [2020-09-15 01:30:21,905 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 01:30:21,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 01:30:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 01:30:21,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-09-15 01:30:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:30:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-09-15 01:30:21,907 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-09-15 01:30:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:21,907 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-09-15 01:30:21,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-09-15 01:30:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:21,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:21,908 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:22,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:22,109 INFO L427 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:22,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-09-15 01:30:22,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:22,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344559569] [2020-09-15 01:30:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:23,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344559569] [2020-09-15 01:30:23,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779445313] [2020-09-15 01:30:23,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:23,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:30:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:23,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:23,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:23,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:23,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:23,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430074149] [2020-09-15 01:30:23,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:23,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:23,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:23,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:23,256 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-09-15 01:30:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:27,078 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-09-15 01:30:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 01:30:27,081 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:27,082 INFO L225 Difference]: With dead ends: 154 [2020-09-15 01:30:27,082 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:30:27,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 01:30:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:30:27,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-09-15 01:30:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:30:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-09-15 01:30:27,085 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-09-15 01:30:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:27,085 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-09-15 01:30:27,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-09-15 01:30:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:27,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:27,085 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:27,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-09-15 01:30:27,286 INFO L427 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:27,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-09-15 01:30:27,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:27,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982033854] [2020-09-15 01:30:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:28,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982033854] [2020-09-15 01:30:28,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814201389] [2020-09-15 01:30:28,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:28,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:30:28,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:28,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:28,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:28,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:28,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:28,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723751312] [2020-09-15 01:30:28,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:28,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:28,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:28,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:28,427 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-09-15 01:30:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:31,794 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-09-15 01:30:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-15 01:30:31,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:31,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:31,797 INFO L225 Difference]: With dead ends: 155 [2020-09-15 01:30:31,797 INFO L226 Difference]: Without dead ends: 149 [2020-09-15 01:30:31,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 01:30:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-15 01:30:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-09-15 01:30:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 01:30:31,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-09-15 01:30:31,805 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-09-15 01:30:31,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:31,805 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-09-15 01:30:31,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-09-15 01:30:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:31,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:31,806 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:32,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-09-15 01:30:32,007 INFO L427 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:32,007 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-09-15 01:30:32,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:32,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646836840] [2020-09-15 01:30:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:32,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646836840] [2020-09-15 01:30:32,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266738472] [2020-09-15 01:30:32,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:33,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:30:33,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:33,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:33,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:33,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:33,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:33,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:33,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238310001] [2020-09-15 01:30:33,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:33,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:33,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:33,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:33,169 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-09-15 01:30:37,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:37,306 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-09-15 01:30:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 01:30:37,309 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:37,310 INFO L225 Difference]: With dead ends: 152 [2020-09-15 01:30:37,310 INFO L226 Difference]: Without dead ends: 146 [2020-09-15 01:30:37,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 01:30:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-15 01:30:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-09-15 01:30:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 01:30:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-09-15 01:30:37,313 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-09-15 01:30:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:37,313 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-09-15 01:30:37,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-09-15 01:30:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:37,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:37,313 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:37,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:37,514 INFO L427 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-09-15 01:30:37,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:37,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539169986] [2020-09-15 01:30:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:38,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539169986] [2020-09-15 01:30:38,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787704282] [2020-09-15 01:30:38,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:38,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:38,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:38,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:38,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370758493] [2020-09-15 01:30:38,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:38,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:38,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:38,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:38,617 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-09-15 01:30:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:42,197 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-09-15 01:30:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 01:30:42,200 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:42,200 INFO L225 Difference]: With dead ends: 153 [2020-09-15 01:30:42,200 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:30:42,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 01:30:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:30:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-09-15 01:30:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:30:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-15 01:30:42,203 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-09-15 01:30:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:42,203 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-15 01:30:42,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-15 01:30:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:42,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:42,204 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:42,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-09-15 01:30:42,405 INFO L427 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:42,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-09-15 01:30:42,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:42,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115129762] [2020-09-15 01:30:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:43,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115129762] [2020-09-15 01:30:43,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785755684] [2020-09-15 01:30:43,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:43,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:30:43,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:43,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:43,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:43,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:43,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:43,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353447281] [2020-09-15 01:30:43,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:43,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:43,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:43,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:43,634 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-09-15 01:30:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:48,000 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-09-15 01:30:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 01:30:48,003 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:48,004 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:30:48,004 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:30:48,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-09-15 01:30:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:30:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-09-15 01:30:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:30:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-15 01:30:48,007 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-09-15 01:30:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:48,007 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-15 01:30:48,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-15 01:30:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:48,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:48,008 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:48,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:48,209 INFO L427 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-09-15 01:30:48,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:48,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66917139] [2020-09-15 01:30:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:49,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66917139] [2020-09-15 01:30:49,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063672663] [2020-09-15 01:30:49,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:49,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:30:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:49,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:49,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:49,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:49,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:30:49,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306021636] [2020-09-15 01:30:49,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:30:49,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:30:49,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:30:49,362 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-09-15 01:30:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:53,197 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-09-15 01:30:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-15 01:30:53,200 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:30:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:53,200 INFO L225 Difference]: With dead ends: 151 [2020-09-15 01:30:53,200 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 01:30:53,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 01:30:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 01:30:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-09-15 01:30:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-15 01:30:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-09-15 01:30:53,203 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-09-15 01:30:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:53,203 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-09-15 01:30:53,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:30:53,203 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-09-15 01:30:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:53,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:53,204 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:53,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-09-15 01:30:53,405 INFO L427 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:53,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:53,405 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-09-15 01:30:53,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:53,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108259457] [2020-09-15 01:30:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:30:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:54,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108259457] [2020-09-15 01:30:54,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928150269] [2020-09-15 01:30:54,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:54,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:30:54,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:30:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:30:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:30:54,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:30:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:30:54,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:30:54,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:30:54,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629200357] [2020-09-15 01:30:54,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:30:54,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:30:54,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:30:54,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:30:54,596 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-09-15 01:30:59,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:30:59,076 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-09-15 01:30:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 01:30:59,079 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:30:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:30:59,079 INFO L225 Difference]: With dead ends: 148 [2020-09-15 01:30:59,079 INFO L226 Difference]: Without dead ends: 142 [2020-09-15 01:30:59,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-09-15 01:30:59,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-15 01:30:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-09-15 01:30:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 01:30:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-09-15 01:30:59,083 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-09-15 01:30:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:30:59,083 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-09-15 01:30:59,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:30:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-09-15 01:30:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:30:59,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:30:59,084 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:30:59,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:30:59,285 INFO L427 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:30:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:30:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-09-15 01:30:59,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:30:59,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987074724] [2020-09-15 01:30:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:30:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:00,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987074724] [2020-09-15 01:31:00,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057533435] [2020-09-15 01:31:00,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:00,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:31:00,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:31:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:00,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:00,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 01:31:00,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874070917] [2020-09-15 01:31:00,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 01:31:00,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 01:31:00,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:31:00,479 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-09-15 01:31:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:04,440 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-09-15 01:31:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-15 01:31:04,443 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-15 01:31:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:04,444 INFO L225 Difference]: With dead ends: 168 [2020-09-15 01:31:04,444 INFO L226 Difference]: Without dead ends: 162 [2020-09-15 01:31:04,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-09-15 01:31:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-15 01:31:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-09-15 01:31:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-15 01:31:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-09-15 01:31:04,447 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-09-15 01:31:04,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:04,447 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-09-15 01:31:04,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 01:31:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-09-15 01:31:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 01:31:04,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:04,447 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:04,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:04,648 INFO L427 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-09-15 01:31:04,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:04,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386307175] [2020-09-15 01:31:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:05,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386307175] [2020-09-15 01:31:05,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288331463] [2020-09-15 01:31:05,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:05,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:31:05,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 01:31:05,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:05,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:31:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:05,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:05,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-15 01:31:05,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013596640] [2020-09-15 01:31:05,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:31:05,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:05,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:31:05,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:31:05,856 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-09-15 01:31:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:10,570 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-09-15 01:31:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 01:31:10,573 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 01:31:10,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:10,574 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:31:10,574 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 01:31:10,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-09-15 01:31:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 01:31:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-09-15 01:31:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-15 01:31:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-09-15 01:31:10,577 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-09-15 01:31:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:10,577 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-09-15 01:31:10,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-09-15 01:31:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:10,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:10,577 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:10,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:10,778 INFO L427 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:10,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:10,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-09-15 01:31:10,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:10,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213327615] [2020-09-15 01:31:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:12,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213327615] [2020-09-15 01:31:12,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851154058] [2020-09-15 01:31:12,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:12,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:12,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:12,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 01:31:12,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401506666] [2020-09-15 01:31:12,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:31:12,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:12,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:31:12,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:31:12,240 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-09-15 01:31:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:14,366 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-09-15 01:31:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:31:14,369 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-15 01:31:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:14,369 INFO L225 Difference]: With dead ends: 174 [2020-09-15 01:31:14,369 INFO L226 Difference]: Without dead ends: 168 [2020-09-15 01:31:14,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 01:31:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-15 01:31:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-09-15 01:31:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 01:31:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-15 01:31:14,373 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-15 01:31:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:14,373 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-15 01:31:14,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-15 01:31:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:14,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:14,373 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:14,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-09-15 01:31:14,574 INFO L427 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:14,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-09-15 01:31:14,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:14,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177646414] [2020-09-15 01:31:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:15,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177646414] [2020-09-15 01:31:15,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563239866] [2020-09-15 01:31:15,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:16,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:31:16,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:16,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:31:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:16,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:16,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-15 01:31:16,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868652934] [2020-09-15 01:31:16,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 01:31:16,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:16,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 01:31:16,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:31:16,113 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-15 01:31:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:18,568 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-09-15 01:31:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:31:18,571 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 01:31:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:18,572 INFO L225 Difference]: With dead ends: 171 [2020-09-15 01:31:18,572 INFO L226 Difference]: Without dead ends: 165 [2020-09-15 01:31:18,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 01:31:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-15 01:31:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-09-15 01:31:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:31:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-15 01:31:18,574 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-15 01:31:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:18,575 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-15 01:31:18,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 01:31:18,575 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-15 01:31:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:18,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:18,575 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:18,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:18,776 INFO L427 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:18,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:18,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-09-15 01:31:18,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:18,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166562478] [2020-09-15 01:31:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:20,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166562478] [2020-09-15 01:31:20,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450897739] [2020-09-15 01:31:20,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:20,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 01:31:20,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:20,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:20,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:20,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:20,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 01:31:20,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121603123] [2020-09-15 01:31:20,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:31:20,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:31:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:31:20,206 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-09-15 01:31:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:22,484 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-09-15 01:31:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:31:22,487 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-15 01:31:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:22,488 INFO L225 Difference]: With dead ends: 168 [2020-09-15 01:31:22,488 INFO L226 Difference]: Without dead ends: 162 [2020-09-15 01:31:22,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 01:31:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-15 01:31:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-09-15 01:31:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 01:31:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-15 01:31:22,491 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-15 01:31:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:22,491 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-15 01:31:22,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-15 01:31:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:22,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:22,492 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:22,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-09-15 01:31:22,693 INFO L427 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:22,693 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-09-15 01:31:22,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:22,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845151315] [2020-09-15 01:31:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:24,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845151315] [2020-09-15 01:31:24,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684491929] [2020-09-15 01:31:24,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:24,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:31:24,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:24,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:24,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:24,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:31:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:24,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:24,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-15 01:31:24,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207235620] [2020-09-15 01:31:24,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 01:31:24,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:24,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 01:31:24,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:31:24,214 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-15 01:31:26,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:26,897 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-09-15 01:31:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:31:26,900 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 01:31:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:26,900 INFO L225 Difference]: With dead ends: 167 [2020-09-15 01:31:26,900 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:31:26,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 01:31:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:31:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-09-15 01:31:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:31:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-15 01:31:26,908 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-15 01:31:26,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:26,908 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-15 01:31:26,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 01:31:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-15 01:31:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:26,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:26,909 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:27,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:27,110 INFO L427 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-09-15 01:31:27,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:27,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693368038] [2020-09-15 01:31:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:28,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693368038] [2020-09-15 01:31:28,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251036944] [2020-09-15 01:31:28,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:28,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 01:31:28,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:28,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:28,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:28,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 01:31:28,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714320471] [2020-09-15 01:31:28,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:31:28,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:28,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:31:28,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:31:28,485 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-09-15 01:31:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:31,036 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-09-15 01:31:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:31:31,039 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-15 01:31:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:31,039 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:31:31,039 INFO L226 Difference]: Without dead ends: 158 [2020-09-15 01:31:31,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 01:31:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-15 01:31:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2020-09-15 01:31:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 01:31:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-15 01:31:31,043 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-15 01:31:31,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:31,043 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-15 01:31:31,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-15 01:31:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:31,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:31,044 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:31,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2020-09-15 01:31:31,245 INFO L427 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:31,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1085526113, now seen corresponding path program 366 times [2020-09-15 01:31:31,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:31,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189010187] [2020-09-15 01:31:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:32,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189010187] [2020-09-15 01:31:32,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232086169] [2020-09-15 01:31:32,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:32,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 01:31:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:32,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:32,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:32,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:31:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:32,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:32,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-15 01:31:32,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135434261] [2020-09-15 01:31:32,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 01:31:32,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:32,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 01:31:32,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:31:32,707 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-15 01:31:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:35,744 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-09-15 01:31:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:31:35,747 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 01:31:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:35,748 INFO L225 Difference]: With dead ends: 163 [2020-09-15 01:31:35,748 INFO L226 Difference]: Without dead ends: 157 [2020-09-15 01:31:35,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1062, Invalid=2970, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 01:31:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-15 01:31:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-09-15 01:31:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:31:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-15 01:31:35,751 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-15 01:31:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:35,751 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-15 01:31:35,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 01:31:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-15 01:31:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:35,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:35,751 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:35,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2020-09-15 01:31:35,952 INFO L427 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 367 times [2020-09-15 01:31:35,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:35,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316787636] [2020-09-15 01:31:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:37,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316787636] [2020-09-15 01:31:37,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522856511] [2020-09-15 01:31:37,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:37,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:37,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:37,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:37,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 01:31:37,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221701834] [2020-09-15 01:31:37,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 01:31:37,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:37,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 01:31:37,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:31:37,287 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-09-15 01:31:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:40,064 INFO L93 Difference]: Finished difference Result 160 states and 383 transitions. [2020-09-15 01:31:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:31:40,067 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-15 01:31:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:40,067 INFO L225 Difference]: With dead ends: 160 [2020-09-15 01:31:40,067 INFO L226 Difference]: Without dead ends: 154 [2020-09-15 01:31:40,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1020, Invalid=2886, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 01:31:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-15 01:31:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 111. [2020-09-15 01:31:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 01:31:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-15 01:31:40,070 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-15 01:31:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:40,071 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-15 01:31:40,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 01:31:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-15 01:31:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:40,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:40,071 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:40,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:40,272 INFO L427 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:40,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:40,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1902475009, now seen corresponding path program 368 times [2020-09-15 01:31:40,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:40,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557166300] [2020-09-15 01:31:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:31:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:31:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:41,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557166300] [2020-09-15 01:31:41,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394615228] [2020-09-15 01:31:41,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:31:41,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:31:41,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:31:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 01:31:41,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:31:41,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:31:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:31:41,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:31:41,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-15 01:31:41,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173100436] [2020-09-15 01:31:41,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 01:31:41,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:31:41,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 01:31:41,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:31:41,736 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-15 01:31:45,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:31:45,002 INFO L93 Difference]: Finished difference Result 159 states and 381 transitions. [2020-09-15 01:31:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:31:45,005 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 01:31:45,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:31:45,005 INFO L225 Difference]: With dead ends: 159 [2020-09-15 01:31:45,005 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 01:31:45,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1100, Invalid=3190, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 01:31:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 01:31:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2020-09-15 01:31:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:31:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-15 01:31:45,008 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-15 01:31:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:31:45,008 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-15 01:31:45,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 01:31:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-15 01:31:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 01:31:45,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:31:45,013 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:31:45,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2020-09-15 01:31:45,214 INFO L427 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:31:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:31:45,215 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 369 times [2020-09-15 01:31:45,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:31:45,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088640437] [2020-09-15 01:31:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY