/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:41:44,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:41:44,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:41:44,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:41:44,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:41:44,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:41:44,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:41:44,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:41:44,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:41:44,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:41:44,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:41:44,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:41:44,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:41:44,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:41:44,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:41:44,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:41:44,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:41:44,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:41:44,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:41:44,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:41:44,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:41:44,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:41:44,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:41:44,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:41:44,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:41:44,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:41:44,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:41:44,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:41:44,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:41:44,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:41:44,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:41:44,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:41:44,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:41:44,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:41:44,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:41:44,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:41:44,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:41:44,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:41:44,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:41:44,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:41:44,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:41:44,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-04-17 18:41:44,419 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:41:44,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:41:44,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:41:44,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:41:44,421 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:41:44,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:41:44,421 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:41:44,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:41:44,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:41:44,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:41:44,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:41:44,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:41:44,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:41:44,423 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:41:44,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:41:44,423 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:41:44,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:41:44,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:41:44,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:41:44,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:41:44,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:41:44,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:41:44,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:41:44,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:41:44,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:41:44,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:41:44,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:41:44,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:41:44,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:41:44,743 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:41:44,769 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:41:44,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:41:44,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:41:44,777 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:41:44,778 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-17 18:41:44,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6261112c9/029272717f0a4d1bb79997071ed7ca83/FLAGbbec67692 [2020-04-17 18:41:45,443 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:41:45,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-17 18:41:45,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6261112c9/029272717f0a4d1bb79997071ed7ca83/FLAGbbec67692 [2020-04-17 18:41:45,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6261112c9/029272717f0a4d1bb79997071ed7ca83 [2020-04-17 18:41:45,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:41:45,798 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:41:45,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:41:45,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:41:45,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:41:45,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:41:45" (1/1) ... [2020-04-17 18:41:45,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@446e0e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:45, skipping insertion in model container [2020-04-17 18:41:45,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:41:45" (1/1) ... [2020-04-17 18:41:45,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:41:45,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:41:46,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:41:46,320 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:41:46,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:41:46,488 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:41:46,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46 WrapperNode [2020-04-17 18:41:46,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:41:46,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:41:46,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:41:46,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:41:46,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:41:46,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:41:46,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:41:46,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:41:46,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... [2020-04-17 18:41:46,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:41:46,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:41:46,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:41:46,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:41:46,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:41:46,665 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 18:41:46,665 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 18:41:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 18:41:46,666 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 18:41:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:41:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 18:41:46,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:41:46,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:41:46,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 18:41:46,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:41:46,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:41:46,669 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:41:47,018 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:41:47,019 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 18:41:47,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:41:47 BoogieIcfgContainer [2020-04-17 18:41:47,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:41:47,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:41:47,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:41:47,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:41:47,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:41:45" (1/3) ... [2020-04-17 18:41:47,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e69de8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:41:47, skipping insertion in model container [2020-04-17 18:41:47,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:41:46" (2/3) ... [2020-04-17 18:41:47,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e69de8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:41:47, skipping insertion in model container [2020-04-17 18:41:47,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:41:47" (3/3) ... [2020-04-17 18:41:47,032 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-04-17 18:41:47,043 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:41:47,043 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:41:47,051 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:41:47,052 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:41:47,086 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,086 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,087 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,087 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,088 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,088 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,088 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,089 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,089 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,089 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,090 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,090 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,090 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,090 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,091 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,091 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,093 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,093 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,093 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,094 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,094 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,094 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,095 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,095 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,098 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,098 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,099 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,099 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,099 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,100 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,103 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,104 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,104 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,104 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,105 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,105 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,110 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,111 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,111 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,111 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,112 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,112 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:41:47,126 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 18:41:47,143 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:41:47,143 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:41:47,143 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:41:47,143 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:41:47,143 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:41:47,143 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:41:47,144 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:41:47,144 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:41:47,157 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,159 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,196 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 18:41:47,197 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:41:47,203 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 18:41:47,206 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 18:41:47,225 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 18:41:47,225 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:41:47,226 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 18:41:47,228 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-17 18:41:47,229 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:41:48,522 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-17 18:41:48,625 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-17 18:41:48,625 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-17 18:41:48,630 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-17 18:41:48,643 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 18:41:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 18:41:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 18:41:48,654 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:48,655 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 18:41:48,655 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:48,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-17 18:41:48,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:48,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941615143] [2020-04-17 18:41:48,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:48,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941615143] [2020-04-17 18:41:48,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:48,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:41:48,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897804144] [2020-04-17 18:41:48,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:41:48,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:48,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:41:48,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:41:48,960 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 18:41:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,075 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-17 18:41:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:41:49,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 18:41:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,099 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:41:49,099 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:41:49,101 INFO L678 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 [2020-04-17 18:41:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:41:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-17 18:41:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:41:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-17 18:41:49,162 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-17 18:41:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,163 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-17 18:41:49,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:41:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-17 18:41:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,169 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,169 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,169 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-17 18:41:49,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117491471] [2020-04-17 18:41:49,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117491471] [2020-04-17 18:41:49,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649293122] [2020-04-17 18:41:49,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,358 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-04-17 18:41:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,434 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-17 18:41:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:49,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,436 INFO L225 Difference]: With dead ends: 80 [2020-04-17 18:41:49,437 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 18:41:49,438 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 18:41:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-17 18:41:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:41:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-17 18:41:49,452 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-17 18:41:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,455 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-17 18:41:49,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-17 18:41:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,459 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,460 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,460 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,460 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-17 18:41:49,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888076365] [2020-04-17 18:41:49,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888076365] [2020-04-17 18:41:49,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535305491] [2020-04-17 18:41:49,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,585 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-04-17 18:41:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,623 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-04-17 18:41:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:41:49,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,627 INFO L225 Difference]: With dead ends: 73 [2020-04-17 18:41:49,627 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 18:41:49,628 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 18:41:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-04-17 18:41:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:41:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-04-17 18:41:49,645 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-04-17 18:41:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,647 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-04-17 18:41:49,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-04-17 18:41:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:41:49,649 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,649 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,650 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,650 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-04-17 18:41:49,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493242687] [2020-04-17 18:41:49,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493242687] [2020-04-17 18:41:49,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:49,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:41:49,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481478240] [2020-04-17 18:41:49,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:41:49,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:41:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:41:49,750 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-04-17 18:41:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:49,819 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-04-17 18:41:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:49,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:41:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:49,821 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:41:49,821 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 18:41:49,822 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 18:41:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-04-17 18:41:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:41:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-17 18:41:49,831 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-17 18:41:49,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:49,831 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-17 18:41:49,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:41:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-17 18:41:49,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:49,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:49,833 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:49,833 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:49,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:49,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-04-17 18:41:49,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:49,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127555781] [2020-04-17 18:41:49,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:49,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127555781] [2020-04-17 18:41:49,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859158619] [2020-04-17 18:41:49,957 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:50,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:50,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:50,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:50,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:50,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-17 18:41:50,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725408007] [2020-04-17 18:41:50,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:41:50,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:41:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:41:50,124 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-04-17 18:41:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:50,272 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-17 18:41:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:50,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-04-17 18:41:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:50,274 INFO L225 Difference]: With dead ends: 101 [2020-04-17 18:41:50,275 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 18:41:50,275 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 18:41:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-17 18:41:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 18:41:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-17 18:41:50,284 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-17 18:41:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:50,285 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-17 18:41:50,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:41:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-17 18:41:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:50,286 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:50,286 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:50,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,494 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-17 18:41:50,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:50,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594471555] [2020-04-17 18:41:50,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594471555] [2020-04-17 18:41:50,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127626409] [2020-04-17 18:41:50,623 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:50,680 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:50,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:50,682 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:50,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:50,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:50,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:50,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869010132] [2020-04-17 18:41:50,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:50,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:50,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,788 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-04-17 18:41:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:50,822 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 18:41:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:41:50,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:50,823 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:41:50,823 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 18:41:50,824 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 18:41:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-04-17 18:41:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 18:41:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-04-17 18:41:50,839 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-04-17 18:41:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:50,839 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-04-17 18:41:50,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-04-17 18:41:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:50,840 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:50,840 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,045 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-04-17 18:41:51,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079514032] [2020-04-17 18:41:51,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079514032] [2020-04-17 18:41:51,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497765355] [2020-04-17 18:41:51,136 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:41:51,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:51,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:51,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:51,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:51,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595102775] [2020-04-17 18:41:51,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:51,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:51,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:51,244 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-04-17 18:41:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,311 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-04-17 18:41:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:51,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,312 INFO L225 Difference]: With dead ends: 90 [2020-04-17 18:41:51,313 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 18:41:51,313 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:41:51,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 18:41:51,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-04-17 18:41:51,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 18:41:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-04-17 18:41:51,322 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-04-17 18:41:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,322 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-04-17 18:41:51,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-04-17 18:41:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:41:51,323 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,323 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:51,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,528 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-04-17 18:41:51,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:51,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238953467] [2020-04-17 18:41:51,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238953467] [2020-04-17 18:41:51,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747478430] [2020-04-17 18:41:51,614 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:51,663 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:51,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:51,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:41:51,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:51,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:51,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:51,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 18:41:51,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486448573] [2020-04-17 18:41:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:41:51,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:41:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:51,721 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-04-17 18:41:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:51,842 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 18:41:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:51,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 18:41:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:51,844 INFO L225 Difference]: With dead ends: 99 [2020-04-17 18:41:51,844 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 18:41:51,844 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 18:41:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-04-17 18:41:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 18:41:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-04-17 18:41:51,862 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-04-17 18:41:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:51,862 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-04-17 18:41:51,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:41:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-04-17 18:41:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:51,864 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:51,864 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:52,072 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-17 18:41:52,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198606757] [2020-04-17 18:41:52,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198606757] [2020-04-17 18:41:52,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13772801] [2020-04-17 18:41:52,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,138 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-04-17 18:41:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,169 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-04-17 18:41:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:41:52,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,171 INFO L225 Difference]: With dead ends: 92 [2020-04-17 18:41:52,171 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:41:52,171 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:41:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-04-17 18:41:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 18:41:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-04-17 18:41:52,178 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-04-17 18:41:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,178 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-04-17 18:41:52,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-04-17 18:41:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,179 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,179 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,180 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-04-17 18:41:52,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202198848] [2020-04-17 18:41:52,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202198848] [2020-04-17 18:41:52,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704908769] [2020-04-17 18:41:52,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,241 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-04-17 18:41:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,285 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-04-17 18:41:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:52,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,287 INFO L225 Difference]: With dead ends: 100 [2020-04-17 18:41:52,287 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:41:52,288 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:41:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:41:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-04-17 18:41:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 18:41:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-04-17 18:41:52,293 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-04-17 18:41:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,294 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-04-17 18:41:52,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-04-17 18:41:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,295 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,295 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,295 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-04-17 18:41:52,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281127531] [2020-04-17 18:41:52,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281127531] [2020-04-17 18:41:52,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714180988] [2020-04-17 18:41:52,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,351 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-04-17 18:41:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,452 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 18:41:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:52,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,455 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:41:52,455 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:41:52,456 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:41:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 18:41:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:41:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-04-17 18:41:52,461 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-04-17 18:41:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,462 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-04-17 18:41:52,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-04-17 18:41:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,463 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,463 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,463 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-17 18:41:52,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154357873] [2020-04-17 18:41:52,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154357873] [2020-04-17 18:41:52,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:41:52,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:41:52,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537990301] [2020-04-17 18:41:52,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:41:52,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:41:52,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:41:52,530 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-04-17 18:41:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:52,622 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 18:41:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:52,623 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:41:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:52,624 INFO L225 Difference]: With dead ends: 105 [2020-04-17 18:41:52,625 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 18:41:52,625 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:41:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 18:41:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 18:41:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 18:41:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-04-17 18:41:52,631 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-04-17 18:41:52,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:52,632 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-04-17 18:41:52,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:41:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-04-17 18:41:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:52,633 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:52,633 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:52,634 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:52,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-04-17 18:41:52,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:52,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631316349] [2020-04-17 18:41:52,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631316349] [2020-04-17 18:41:52,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772057305] [2020-04-17 18:41:52,727 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:52,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:52,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:52,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:52,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:52,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:52,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:52,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 18:41:52,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473399138] [2020-04-17 18:41:52,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:41:52,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:52,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:41:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:52,895 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-04-17 18:41:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:53,015 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-04-17 18:41:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:53,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-04-17 18:41:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:53,017 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:41:53,017 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:41:53,018 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:41:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:41:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-04-17 18:41:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 18:41:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-04-17 18:41:53,022 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-04-17 18:41:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:53,023 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-04-17 18:41:53,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:41:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-04-17 18:41:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:53,024 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:53,024 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:53,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,234 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:53,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-17 18:41:53,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:53,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322465462] [2020-04-17 18:41:53,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322465462] [2020-04-17 18:41:53,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498032288] [2020-04-17 18:41:53,320 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,372 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:53,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:53,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:53,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:53,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:53,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044692181] [2020-04-17 18:41:53,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:53,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:53,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:53,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,464 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-04-17 18:41:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:53,501 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 18:41:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:53,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:53,505 INFO L225 Difference]: With dead ends: 108 [2020-04-17 18:41:53,505 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 18:41:53,506 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 18:41:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-04-17 18:41:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 18:41:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-04-17 18:41:53,512 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-04-17 18:41:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:53,512 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-04-17 18:41:53,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-04-17 18:41:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:53,513 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:53,513 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:53,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,714 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-04-17 18:41:53,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:53,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571111909] [2020-04-17 18:41:53,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571111909] [2020-04-17 18:41:53,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361017480] [2020-04-17 18:41:53,796 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:53,840 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:53,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:53,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:53,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:53,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126638351] [2020-04-17 18:41:53,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:53,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:53,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:53,926 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-04-17 18:41:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:54,018 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-04-17 18:41:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:54,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:54,020 INFO L225 Difference]: With dead ends: 116 [2020-04-17 18:41:54,020 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 18:41:54,021 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 18:41:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-04-17 18:41:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 18:41:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-04-17 18:41:54,042 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-04-17 18:41:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:54,042 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-04-17 18:41:54,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:54,042 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-04-17 18:41:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:54,043 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:54,043 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:54,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,244 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-04-17 18:41:54,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:54,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609232111] [2020-04-17 18:41:54,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609232111] [2020-04-17 18:41:54,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258608383] [2020-04-17 18:41:54,326 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:54,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:54,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:54,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:54,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:54,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262197134] [2020-04-17 18:41:54,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:54,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:54,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:54,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:54,457 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-04-17 18:41:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:54,556 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-04-17 18:41:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:54,557 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:54,559 INFO L225 Difference]: With dead ends: 115 [2020-04-17 18:41:54,559 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 18:41:54,560 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 18:41:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-04-17 18:41:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:41:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-04-17 18:41:54,565 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-04-17 18:41:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:54,565 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-04-17 18:41:54,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-04-17 18:41:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:41:54,566 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:54,566 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:54,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,774 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:54,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-04-17 18:41:54,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:54,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768075321] [2020-04-17 18:41:54,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768075321] [2020-04-17 18:41:54,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029172190] [2020-04-17 18:41:54,840 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:54,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:54,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:54,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:54,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:54,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:54,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:54,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:54,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857044609] [2020-04-17 18:41:54,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:54,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:54,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:54,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:54,976 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-04-17 18:41:55,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:55,090 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-04-17 18:41:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:55,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 18:41:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:55,092 INFO L225 Difference]: With dead ends: 124 [2020-04-17 18:41:55,092 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 18:41:55,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:41:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 18:41:55,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-04-17 18:41:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 18:41:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-04-17 18:41:55,097 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-04-17 18:41:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:55,097 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-04-17 18:41:55,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-04-17 18:41:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:55,098 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:55,098 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:55,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,303 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:55,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-17 18:41:55,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:55,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485486374] [2020-04-17 18:41:55,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485486374] [2020-04-17 18:41:55,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481047822] [2020-04-17 18:41:55,379 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,434 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:55,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:55,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:55,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:55,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:55,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430138937] [2020-04-17 18:41:55,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:55,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:55,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,537 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-04-17 18:41:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:55,587 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-04-17 18:41:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:41:55,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:55,588 INFO L225 Difference]: With dead ends: 113 [2020-04-17 18:41:55,588 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 18:41:55,589 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 18:41:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-04-17 18:41:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 18:41:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-04-17 18:41:55,593 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-04-17 18:41:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:55,593 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-04-17 18:41:55,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-04-17 18:41:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:55,594 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:55,594 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:55,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,801 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:55,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-04-17 18:41:55,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:55,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582712657] [2020-04-17 18:41:55,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:55,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582712657] [2020-04-17 18:41:55,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607634480] [2020-04-17 18:41:55,881 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:55,940 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:55,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:55,941 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:55,942 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:56,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:56,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794238392] [2020-04-17 18:41:56,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:56,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:56,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:56,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:56,033 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-04-17 18:41:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:56,096 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-04-17 18:41:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:56,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:56,097 INFO L225 Difference]: With dead ends: 118 [2020-04-17 18:41:56,098 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 18:41:56,098 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 18:41:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-04-17 18:41:56,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 18:41:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-04-17 18:41:56,102 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-04-17 18:41:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:56,102 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-04-17 18:41:56,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-04-17 18:41:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:56,103 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:56,103 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:56,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,307 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:56,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-04-17 18:41:56,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:56,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642838653] [2020-04-17 18:41:56,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642838653] [2020-04-17 18:41:56,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247566540] [2020-04-17 18:41:56,397 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:56,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:56,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:56,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342946611] [2020-04-17 18:41:56,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:56,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:56,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:56,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:56,527 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-04-17 18:41:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:56,608 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-04-17 18:41:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:56,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:56,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:56,610 INFO L225 Difference]: With dead ends: 119 [2020-04-17 18:41:56,610 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 18:41:56,611 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:56,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 18:41:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 18:41:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 18:41:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-04-17 18:41:56,615 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-04-17 18:41:56,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:56,615 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-04-17 18:41:56,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:56,615 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-04-17 18:41:56,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:56,616 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:56,616 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:56,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,820 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:56,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-04-17 18:41:56,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:56,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653942302] [2020-04-17 18:41:56,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:56,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653942302] [2020-04-17 18:41:56,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023089091] [2020-04-17 18:41:56,900 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:56,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:56,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:56,947 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:56,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:57,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:57,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383508135] [2020-04-17 18:41:57,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:57,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:57,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:57,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:57,041 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-04-17 18:41:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:57,108 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-04-17 18:41:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:41:57,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:57,109 INFO L225 Difference]: With dead ends: 122 [2020-04-17 18:41:57,110 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 18:41:57,110 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:41:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 18:41:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-04-17 18:41:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 18:41:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-04-17 18:41:57,114 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-04-17 18:41:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:57,114 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-04-17 18:41:57,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-04-17 18:41:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:57,115 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:57,115 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:57,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,316 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:57,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-04-17 18:41:57,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:57,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451125797] [2020-04-17 18:41:57,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451125797] [2020-04-17 18:41:57,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151806390] [2020-04-17 18:41:57,380 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:41:57,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:57,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:57,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:57,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:57,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567588868] [2020-04-17 18:41:57,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:57,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:57,493 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-04-17 18:41:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:57,600 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-04-17 18:41:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:41:57,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:57,601 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:41:57,601 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:41:57,602 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:41:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:41:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-04-17 18:41:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:41:57,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-04-17 18:41:57,606 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-04-17 18:41:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:57,606 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-04-17 18:41:57,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:57,607 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-04-17 18:41:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:57,607 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:57,607 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:57,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,811 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:57,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:57,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-04-17 18:41:57,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:57,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157887451] [2020-04-17 18:41:57,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:57,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157887451] [2020-04-17 18:41:57,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318646] [2020-04-17 18:41:57,879 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:57,935 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:41:57,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:57,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:57,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:58,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:58,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952284534] [2020-04-17 18:41:58,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:58,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:58,046 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-04-17 18:41:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:58,165 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 18:41:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:41:58,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:58,166 INFO L225 Difference]: With dead ends: 123 [2020-04-17 18:41:58,167 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 18:41:58,167 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:41:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 18:41:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-04-17 18:41:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-04-17 18:41:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-04-17 18:41:58,173 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-04-17 18:41:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:58,173 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-04-17 18:41:58,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-04-17 18:41:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:58,177 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:58,177 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:58,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,383 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-04-17 18:41:58,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:58,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284054485] [2020-04-17 18:41:58,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284054485] [2020-04-17 18:41:58,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069491374] [2020-04-17 18:41:58,471 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,525 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:41:58,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:58,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:58,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:58,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:58,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:58,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:58,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889724454] [2020-04-17 18:41:58,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:58,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:58,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:58,596 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-04-17 18:41:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:58,776 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-04-17 18:41:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:41:58,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:58,779 INFO L225 Difference]: With dead ends: 133 [2020-04-17 18:41:58,779 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:41:58,779 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:41:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:41:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-04-17 18:41:58,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 18:41:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-04-17 18:41:58,784 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-04-17 18:41:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:58,784 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-04-17 18:41:58,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-04-17 18:41:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:58,785 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:58,785 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:58,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:58,988 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:58,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-04-17 18:41:58,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:58,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387534076] [2020-04-17 18:41:58,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387534076] [2020-04-17 18:41:59,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103385059] [2020-04-17 18:41:59,046 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,092 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:41:59,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:41:59,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:59,094 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:59,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:59,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128942237] [2020-04-17 18:41:59,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:59,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:59,168 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-04-17 18:41:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:59,296 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-04-17 18:41:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:41:59,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:59,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:59,297 INFO L225 Difference]: With dead ends: 127 [2020-04-17 18:41:59,297 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 18:41:59,298 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:41:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 18:41:59,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-04-17 18:41:59,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 18:41:59,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 18:41:59,305 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 18:41:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:59,305 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 18:41:59,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:59,305 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 18:41:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:59,306 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:59,306 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:41:59,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,510 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:41:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:41:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-04-17 18:41:59,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:41:59,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578246009] [2020-04-17 18:41:59,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:41:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578246009] [2020-04-17 18:41:59,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117090101] [2020-04-17 18:41:59,566 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:41:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:41:59,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:41:59,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:41:59,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:41:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:41:59,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:41:59,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:41:59,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337737319] [2020-04-17 18:41:59,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:41:59,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:41:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:41:59,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:41:59,673 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 18:41:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:41:59,888 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-04-17 18:41:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:41:59,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:41:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:41:59,890 INFO L225 Difference]: With dead ends: 141 [2020-04-17 18:41:59,891 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 18:41:59,891 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:41:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 18:41:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-04-17 18:41:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 18:41:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 18:41:59,896 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 18:41:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:41:59,897 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 18:41:59,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:41:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 18:41:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:41:59,898 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:41:59,898 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:00,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,101 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:00,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-04-17 18:42:00,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:00,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446498502] [2020-04-17 18:42:00,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446498502] [2020-04-17 18:42:00,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874660776] [2020-04-17 18:42:00,202 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:00,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:00,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:00,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:00,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:00,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:00,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489400643] [2020-04-17 18:42:00,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:00,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:00,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:00,319 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 18:42:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:00,501 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-04-17 18:42:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:00,502 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:00,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:00,503 INFO L225 Difference]: With dead ends: 136 [2020-04-17 18:42:00,503 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 18:42:00,504 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 18:42:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-04-17 18:42:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:00,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-04-17 18:42:00,509 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-04-17 18:42:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:00,509 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-04-17 18:42:00,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-04-17 18:42:00,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:00,510 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:00,510 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:00,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,714 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:00,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-04-17 18:42:00,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:00,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736173327] [2020-04-17 18:42:00,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736173327] [2020-04-17 18:42:00,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421003866] [2020-04-17 18:42:00,787 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:00,841 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:00,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:00,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:00,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:00,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:00,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:00,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835152273] [2020-04-17 18:42:00,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:00,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:00,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:00,920 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-04-17 18:42:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:01,032 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-04-17 18:42:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:01,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:01,034 INFO L225 Difference]: With dead ends: 130 [2020-04-17 18:42:01,034 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 18:42:01,034 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 18:42:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-04-17 18:42:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:42:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 18:42:01,037 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 18:42:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:01,037 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 18:42:01,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 18:42:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:01,038 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:01,038 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:01,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,241 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-04-17 18:42:01,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:01,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609105340] [2020-04-17 18:42:01,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609105340] [2020-04-17 18:42:01,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279918366] [2020-04-17 18:42:01,330 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:01,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:01,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:01,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:01,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:01,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598750197] [2020-04-17 18:42:01,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:01,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:01,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:01,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:01,475 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 18:42:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:01,603 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-04-17 18:42:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:01,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:01,604 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:42:01,604 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 18:42:01,605 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 18:42:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-04-17 18:42:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 18:42:01,610 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 18:42:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:01,610 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 18:42:01,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 18:42:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:01,611 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:01,611 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:01,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,815 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-04-17 18:42:01,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:01,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893589408] [2020-04-17 18:42:01,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893589408] [2020-04-17 18:42:01,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633726776] [2020-04-17 18:42:01,869 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:01,914 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:01,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:01,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:01,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:01,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:01,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:01,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:01,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974625533] [2020-04-17 18:42:01,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:01,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:01,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:01,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:01,983 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 18:42:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:02,127 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-04-17 18:42:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:02,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:02,128 INFO L225 Difference]: With dead ends: 131 [2020-04-17 18:42:02,128 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 18:42:02,129 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 18:42:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-04-17 18:42:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 18:42:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 18:42:02,134 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 18:42:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:02,134 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 18:42:02,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 18:42:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:02,135 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:02,135 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:02,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,339 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:02,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-04-17 18:42:02,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:02,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022761313] [2020-04-17 18:42:02,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022761313] [2020-04-17 18:42:02,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435347327] [2020-04-17 18:42:02,392 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,443 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:02,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:02,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:02,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:02,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:02,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:02,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:02,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544573925] [2020-04-17 18:42:02,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:02,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:02,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:02,511 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 18:42:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:02,738 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-04-17 18:42:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:02,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:02,745 INFO L225 Difference]: With dead ends: 145 [2020-04-17 18:42:02,745 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 18:42:02,746 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:02,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 18:42:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-04-17 18:42:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 18:42:02,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 18:42:02,750 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 18:42:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:02,750 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 18:42:02,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 18:42:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:02,751 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:02,751 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:02,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:02,955 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:02,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-04-17 18:42:02,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:02,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324358204] [2020-04-17 18:42:02,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324358204] [2020-04-17 18:42:03,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167942031] [2020-04-17 18:42:03,008 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:03,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:42:03,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:03,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:03,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 18:42:03,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741067748] [2020-04-17 18:42:03,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:42:03,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:03,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:42:03,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:42:03,111 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 18:42:03,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:03,280 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-04-17 18:42:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:03,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 18:42:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:03,285 INFO L225 Difference]: With dead ends: 135 [2020-04-17 18:42:03,285 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 18:42:03,286 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 18:42:03,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-04-17 18:42:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 18:42:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-04-17 18:42:03,290 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-04-17 18:42:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:03,290 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-04-17 18:42:03,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:42:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-04-17 18:42:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:03,291 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:03,291 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:03,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,495 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:03,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:03,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-04-17 18:42:03,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:03,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253974367] [2020-04-17 18:42:03,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253974367] [2020-04-17 18:42:03,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264442727] [2020-04-17 18:42:03,562 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:03,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:03,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:03,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:03,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:03,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:03,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:03,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 18:42:03,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900986262] [2020-04-17 18:42:03,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:42:03,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:42:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:03,703 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-04-17 18:42:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:03,845 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-04-17 18:42:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:03,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-04-17 18:42:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:03,852 INFO L225 Difference]: With dead ends: 143 [2020-04-17 18:42:03,852 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:42:03,852 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:42:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-04-17 18:42:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-04-17 18:42:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-04-17 18:42:03,856 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-04-17 18:42:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:03,857 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-04-17 18:42:03,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:42:03,857 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-04-17 18:42:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:03,857 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:03,858 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:04,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,061 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-04-17 18:42:04,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:04,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126961915] [2020-04-17 18:42:04,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126961915] [2020-04-17 18:42:04,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623487108] [2020-04-17 18:42:04,168 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,212 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:04,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:04,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:04,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:04,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:04,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738679910] [2020-04-17 18:42:04,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:04,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:04,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:04,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,310 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-04-17 18:42:04,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:04,352 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-04-17 18:42:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:42:04,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:04,354 INFO L225 Difference]: With dead ends: 132 [2020-04-17 18:42:04,354 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 18:42:04,354 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 18:42:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-04-17 18:42:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 18:42:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 18:42:04,357 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 18:42:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:04,358 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 18:42:04,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 18:42:04,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:04,359 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:04,359 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:04,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,563 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:04,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:04,563 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-04-17 18:42:04,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:04,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755657162] [2020-04-17 18:42:04,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755657162] [2020-04-17 18:42:04,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092942554] [2020-04-17 18:42:04,660 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:04,700 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:04,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:04,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:04,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:04,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:04,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:04,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481255919] [2020-04-17 18:42:04,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:04,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:04,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:04,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:04,822 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 18:42:04,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:04,881 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-04-17 18:42:04,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:04,882 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:04,883 INFO L225 Difference]: With dead ends: 143 [2020-04-17 18:42:04,883 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 18:42:04,884 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 18:42:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-04-17 18:42:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 18:42:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 18:42:04,890 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 18:42:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:04,890 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 18:42:04,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 18:42:04,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:04,894 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:04,894 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:05,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,097 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:05,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-04-17 18:42:05,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:05,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951517682] [2020-04-17 18:42:05,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951517682] [2020-04-17 18:42:05,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637812371] [2020-04-17 18:42:05,173 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,219 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:05,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:05,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:05,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:05,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:05,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005394604] [2020-04-17 18:42:05,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:05,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:05,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:05,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:05,312 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 18:42:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:05,395 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-04-17 18:42:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:05,396 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:05,397 INFO L225 Difference]: With dead ends: 142 [2020-04-17 18:42:05,397 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 18:42:05,397 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 18:42:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-04-17 18:42:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-04-17 18:42:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-04-17 18:42:05,401 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-04-17 18:42:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:05,401 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-04-17 18:42:05,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-04-17 18:42:05,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:05,402 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:05,402 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:05,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,605 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:05,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-04-17 18:42:05,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:05,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118139782] [2020-04-17 18:42:05,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118139782] [2020-04-17 18:42:05,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531902307] [2020-04-17 18:42:05,673 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:05,715 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:05,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:05,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:05,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:05,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065588978] [2020-04-17 18:42:05,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:05,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:05,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:05,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:05,832 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-04-17 18:42:05,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:05,966 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-04-17 18:42:05,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:05,967 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:05,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:05,969 INFO L225 Difference]: With dead ends: 141 [2020-04-17 18:42:05,969 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 18:42:05,969 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 18:42:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-04-17 18:42:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 18:42:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-04-17 18:42:05,975 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-04-17 18:42:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:05,976 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-04-17 18:42:05,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-04-17 18:42:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:42:05,977 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:05,977 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:06,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,182 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:06,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:06,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-04-17 18:42:06,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:06,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104261405] [2020-04-17 18:42:06,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104261405] [2020-04-17 18:42:06,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908948714] [2020-04-17 18:42:06,272 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:06,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:06,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:06,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:06,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:06,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:06,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863263236] [2020-04-17 18:42:06,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:06,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:06,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:06,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:06,466 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-04-17 18:42:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:06,615 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 18:42:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:06,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 18:42:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:06,617 INFO L225 Difference]: With dead ends: 150 [2020-04-17 18:42:06,617 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 18:42:06,617 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 18:42:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-04-17 18:42:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-04-17 18:42:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-04-17 18:42:06,621 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-04-17 18:42:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:06,621 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-04-17 18:42:06,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-04-17 18:42:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:06,622 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:06,622 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:06,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,826 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:06,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-04-17 18:42:06,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:06,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191333478] [2020-04-17 18:42:06,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:06,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191333478] [2020-04-17 18:42:06,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930025199] [2020-04-17 18:42:06,903 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:06,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:06,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:06,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:06,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:07,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:07,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573146305] [2020-04-17 18:42:07,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:07,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:07,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:07,093 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-04-17 18:42:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:07,170 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-04-17 18:42:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:42:07,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:07,172 INFO L225 Difference]: With dead ends: 138 [2020-04-17 18:42:07,172 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 18:42:07,173 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 18:42:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-04-17 18:42:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 18:42:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-04-17 18:42:07,178 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-04-17 18:42:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:07,179 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-04-17 18:42:07,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-04-17 18:42:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:07,180 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:07,180 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:07,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,384 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:07,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-04-17 18:42:07,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:07,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151052968] [2020-04-17 18:42:07,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151052968] [2020-04-17 18:42:07,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512462939] [2020-04-17 18:42:07,489 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:07,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:07,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:07,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:07,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:07,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:07,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927283690] [2020-04-17 18:42:07,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:07,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:07,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:07,654 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-04-17 18:42:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:07,759 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-04-17 18:42:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:07,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:07,761 INFO L225 Difference]: With dead ends: 145 [2020-04-17 18:42:07,761 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 18:42:07,762 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 18:42:07,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-04-17 18:42:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-04-17 18:42:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-04-17 18:42:07,768 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-04-17 18:42:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:07,768 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-04-17 18:42:07,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-04-17 18:42:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:07,769 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:07,769 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:07,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:07,973 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:07,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-04-17 18:42:07,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:07,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453480326] [2020-04-17 18:42:07,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453480326] [2020-04-17 18:42:08,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471950985] [2020-04-17 18:42:08,046 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,085 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:08,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:08,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:08,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:08,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:08,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156113924] [2020-04-17 18:42:08,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:08,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:08,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:08,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:08,169 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-04-17 18:42:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:08,299 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 18:42:08,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:08,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:08,300 INFO L225 Difference]: With dead ends: 150 [2020-04-17 18:42:08,301 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 18:42:08,301 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 18:42:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-04-17 18:42:08,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-04-17 18:42:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-04-17 18:42:08,306 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-04-17 18:42:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:08,307 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-04-17 18:42:08,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-04-17 18:42:08,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:08,308 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:08,308 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:08,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,512 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:08,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:08,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-04-17 18:42:08,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:08,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432462072] [2020-04-17 18:42:08,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432462072] [2020-04-17 18:42:08,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783690861] [2020-04-17 18:42:08,596 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:08,640 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:08,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:08,640 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:08,641 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:08,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:08,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:08,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820397015] [2020-04-17 18:42:08,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:08,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:08,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:08,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:08,727 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:08,824 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-04-17 18:42:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:08,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:08,825 INFO L225 Difference]: With dead ends: 148 [2020-04-17 18:42:08,825 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 18:42:08,826 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 18:42:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-04-17 18:42:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 18:42:08,830 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 18:42:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:08,830 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 18:42:08,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 18:42:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:08,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:08,832 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:09,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,035 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:09,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-04-17 18:42:09,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:09,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718624867] [2020-04-17 18:42:09,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718624867] [2020-04-17 18:42:09,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067373704] [2020-04-17 18:42:09,110 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,158 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:09,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:09,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:09,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:09,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:09,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079550396] [2020-04-17 18:42:09,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:09,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:09,243 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 18:42:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:09,365 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-04-17 18:42:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:09,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:09,367 INFO L225 Difference]: With dead ends: 149 [2020-04-17 18:42:09,367 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 18:42:09,367 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 18:42:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-04-17 18:42:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-04-17 18:42:09,372 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-04-17 18:42:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:09,372 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-04-17 18:42:09,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-04-17 18:42:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:09,373 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:09,373 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:09,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,577 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-04-17 18:42:09,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:09,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094376583] [2020-04-17 18:42:09,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094376583] [2020-04-17 18:42:09,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643861360] [2020-04-17 18:42:09,690 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:09,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:09,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:09,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:09,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:09,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341606996] [2020-04-17 18:42:09,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:09,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:09,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:09,822 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-04-17 18:42:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:09,897 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-04-17 18:42:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:09,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:09,899 INFO L225 Difference]: With dead ends: 152 [2020-04-17 18:42:09,900 INFO L226 Difference]: Without dead ends: 150 [2020-04-17 18:42:09,900 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-04-17 18:42:09,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-04-17 18:42:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-04-17 18:42:09,905 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-04-17 18:42:09,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:09,905 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-04-17 18:42:09,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-04-17 18:42:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:09,906 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:09,906 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:10,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,109 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-04-17 18:42:10,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:10,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413309406] [2020-04-17 18:42:10,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413309406] [2020-04-17 18:42:10,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771553546] [2020-04-17 18:42:10,188 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:10,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:10,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:10,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:10,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:10,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407554517] [2020-04-17 18:42:10,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:10,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:10,330 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-04-17 18:42:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:10,496 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-04-17 18:42:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:10,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:10,498 INFO L225 Difference]: With dead ends: 153 [2020-04-17 18:42:10,498 INFO L226 Difference]: Without dead ends: 151 [2020-04-17 18:42:10,498 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-04-17 18:42:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-04-17 18:42:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 18:42:10,503 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 18:42:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:10,503 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 18:42:10,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 18:42:10,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:10,504 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:10,504 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:10,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,707 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:10,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-04-17 18:42:10,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:10,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279844804] [2020-04-17 18:42:10,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279844804] [2020-04-17 18:42:10,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978542524] [2020-04-17 18:42:10,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:10,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:10,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:10,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:10,825 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:10,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:10,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:10,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128814208] [2020-04-17 18:42:10,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:10,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:10,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:10,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:10,905 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 18:42:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:11,047 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:11,048 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:11,049 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:11,049 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 18:42:11,050 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 18:42:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-04-17 18:42:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 18:42:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-04-17 18:42:11,055 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-04-17 18:42:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:11,055 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-04-17 18:42:11,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-04-17 18:42:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:11,056 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:11,056 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:11,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,259 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-04-17 18:42:11,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:11,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425024065] [2020-04-17 18:42:11,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425024065] [2020-04-17 18:42:11,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125077735] [2020-04-17 18:42:11,341 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,380 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:11,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:11,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:11,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:11,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:11,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017895460] [2020-04-17 18:42:11,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:11,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:11,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:11,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:11,474 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-04-17 18:42:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:11,547 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 18:42:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:11,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:11,549 INFO L225 Difference]: With dead ends: 148 [2020-04-17 18:42:11,549 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 18:42:11,550 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:11,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 18:42:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-04-17 18:42:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 18:42:11,553 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 18:42:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:11,554 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 18:42:11,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 18:42:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:11,554 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:11,554 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:11,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,758 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-04-17 18:42:11,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:11,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573115436] [2020-04-17 18:42:11,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573115436] [2020-04-17 18:42:11,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704924673] [2020-04-17 18:42:11,832 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:11,874 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:11,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:11,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:11,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:11,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:11,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:11,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508329694] [2020-04-17 18:42:11,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:11,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:11,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:11,966 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:12,157 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-04-17 18:42:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:12,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:12,159 INFO L225 Difference]: With dead ends: 157 [2020-04-17 18:42:12,159 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 18:42:12,159 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 18:42:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-04-17 18:42:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-04-17 18:42:12,164 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-04-17 18:42:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:12,164 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-04-17 18:42:12,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:12,165 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-04-17 18:42:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:12,165 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:12,165 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:12,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,369 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-04-17 18:42:12,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:12,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288170543] [2020-04-17 18:42:12,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288170543] [2020-04-17 18:42:12,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139104585] [2020-04-17 18:42:12,447 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,506 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:12,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:12,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:42:12,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:12,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:42:12,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856191804] [2020-04-17 18:42:12,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:42:12,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:12,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:42:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:42:12,558 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-04-17 18:42:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:12,639 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-04-17 18:42:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:12,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:42:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:12,641 INFO L225 Difference]: With dead ends: 149 [2020-04-17 18:42:12,641 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 18:42:12,641 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:42:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 18:42:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-04-17 18:42:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:12,646 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:12,646 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:12,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:42:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:12,647 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:12,647 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:12,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,850 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:12,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-04-17 18:42:12,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:12,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380630761] [2020-04-17 18:42:12,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:12,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380630761] [2020-04-17 18:42:12,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143025981] [2020-04-17 18:42:12,920 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:12,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:12,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:13,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:13,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:13,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668152118] [2020-04-17 18:42:13,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:13,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:13,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:13,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:13,053 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:13,283 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-04-17 18:42:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:13,283 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:13,285 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:13,285 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:13,285 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 18:42:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-04-17 18:42:13,289 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-04-17 18:42:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:13,290 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-04-17 18:42:13,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-04-17 18:42:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:13,290 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:13,291 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:13,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,494 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:13,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-04-17 18:42:13,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:13,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800043817] [2020-04-17 18:42:13,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800043817] [2020-04-17 18:42:13,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917936300] [2020-04-17 18:42:13,560 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:13,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:13,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:13,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:13,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:13,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:13,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944707090] [2020-04-17 18:42:13,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:13,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:13,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:13,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:13,698 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:13,872 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:13,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:13,873 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:13,873 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 18:42:13,874 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 18:42:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-04-17 18:42:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:13,877 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:13,877 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:13,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:13,878 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:13,878 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:14,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:14,081 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:14,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:14,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-04-17 18:42:14,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:14,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43401864] [2020-04-17 18:42:14,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43401864] [2020-04-17 18:42:14,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543575282] [2020-04-17 18:42:14,160 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:14,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:14,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:14,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:14,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:14,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:14,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:14,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567609987] [2020-04-17 18:42:14,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:14,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:14,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:14,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:14,323 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:14,703 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-04-17 18:42:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:14,703 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:14,705 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:14,705 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 18:42:14,706 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:42:14,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 18:42:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-04-17 18:42:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 18:42:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 18:42:14,709 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 18:42:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:14,710 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 18:42:14,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 18:42:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:14,710 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:14,711 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:14,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:14,914 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-04-17 18:42:14,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:14,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464540734] [2020-04-17 18:42:14,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:14,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464540734] [2020-04-17 18:42:14,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334407746] [2020-04-17 18:42:14,985 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,031 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:15,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:15,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:15,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:15,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:15,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:15,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255250565] [2020-04-17 18:42:15,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:15,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:15,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:15,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:15,125 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 18:42:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:15,358 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-04-17 18:42:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:15,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:15,360 INFO L225 Difference]: With dead ends: 166 [2020-04-17 18:42:15,360 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:15,360 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-04-17 18:42:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-04-17 18:42:15,364 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-04-17 18:42:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:15,365 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-04-17 18:42:15,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-04-17 18:42:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:15,365 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:15,366 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:15,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,569 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:15,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-04-17 18:42:15,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:15,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034165917] [2020-04-17 18:42:15,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034165917] [2020-04-17 18:42:15,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980371403] [2020-04-17 18:42:15,643 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:15,695 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:15,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:15,697 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:15,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:15,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:15,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:15,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571486459] [2020-04-17 18:42:15,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:15,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:15,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:15,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:15,809 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-04-17 18:42:16,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:16,032 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-04-17 18:42:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:16,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:16,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:16,035 INFO L225 Difference]: With dead ends: 163 [2020-04-17 18:42:16,035 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:16,035 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-04-17 18:42:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 18:42:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-04-17 18:42:16,039 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-04-17 18:42:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:16,040 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-04-17 18:42:16,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-04-17 18:42:16,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:16,040 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:16,040 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:16,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:16,244 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:16,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-04-17 18:42:16,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:16,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167263095] [2020-04-17 18:42:16,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167263095] [2020-04-17 18:42:16,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947270844] [2020-04-17 18:42:16,316 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:16,382 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:16,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:16,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:16,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:16,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:16,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:16,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543780168] [2020-04-17 18:42:16,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:16,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:16,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:16,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:16,502 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:16,745 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-04-17 18:42:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:16,745 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:16,746 INFO L225 Difference]: With dead ends: 170 [2020-04-17 18:42:16,746 INFO L226 Difference]: Without dead ends: 168 [2020-04-17 18:42:16,746 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-04-17 18:42:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-04-17 18:42:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 18:42:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-04-17 18:42:16,749 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-04-17 18:42:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:16,749 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-04-17 18:42:16,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-04-17 18:42:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:16,750 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:16,750 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:16,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:16,953 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:16,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:16,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-04-17 18:42:16,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:16,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947427024] [2020-04-17 18:42:16,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947427024] [2020-04-17 18:42:17,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292931206] [2020-04-17 18:42:17,006 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:17,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:17,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:17,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:17,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:17,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079633188] [2020-04-17 18:42:17,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:17,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:17,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:17,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:17,115 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-04-17 18:42:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:17,407 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-04-17 18:42:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:17,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:17,409 INFO L225 Difference]: With dead ends: 177 [2020-04-17 18:42:17,409 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 18:42:17,409 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 18:42:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-04-17 18:42:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-04-17 18:42:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-04-17 18:42:17,413 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-04-17 18:42:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:17,413 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-04-17 18:42:17,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-04-17 18:42:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:17,414 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:17,414 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:17,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,618 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-04-17 18:42:17,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:17,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655911352] [2020-04-17 18:42:17,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655911352] [2020-04-17 18:42:17,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062339603] [2020-04-17 18:42:17,667 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:17,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:17,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:17,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:17,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:17,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:17,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:17,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:17,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675997543] [2020-04-17 18:42:17,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:17,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:17,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:17,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:17,769 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-04-17 18:42:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:18,124 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-04-17 18:42:18,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:18,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:18,126 INFO L225 Difference]: With dead ends: 190 [2020-04-17 18:42:18,127 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 18:42:18,127 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:42:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 18:42:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-04-17 18:42:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-04-17 18:42:18,131 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-04-17 18:42:18,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:18,131 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-04-17 18:42:18,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-04-17 18:42:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:18,132 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:18,132 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:18,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,333 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:18,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-04-17 18:42:18,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:18,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978791432] [2020-04-17 18:42:18,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978791432] [2020-04-17 18:42:18,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641733405] [2020-04-17 18:42:18,392 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:18,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:18,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:18,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:18,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:18,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:18,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:18,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:18,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766672624] [2020-04-17 18:42:18,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:18,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:18,524 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-04-17 18:42:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:18,865 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-04-17 18:42:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:18,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:18,867 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:42:18,867 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 18:42:18,868 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 18:42:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-04-17 18:42:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-04-17 18:42:18,871 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-04-17 18:42:18,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:18,871 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-04-17 18:42:18,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-04-17 18:42:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:18,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:18,872 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:19,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,072 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-04-17 18:42:19,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:19,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716484340] [2020-04-17 18:42:19,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716484340] [2020-04-17 18:42:19,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456565834] [2020-04-17 18:42:19,135 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,176 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:19,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:19,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:19,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:19,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:19,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772347094] [2020-04-17 18:42:19,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:19,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:19,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:19,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:19,269 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-04-17 18:42:19,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:19,417 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-04-17 18:42:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:19,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:19,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:19,419 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:19,419 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 18:42:19,419 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:19,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 18:42:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-04-17 18:42:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-04-17 18:42:19,425 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-04-17 18:42:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:19,425 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-04-17 18:42:19,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-04-17 18:42:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:19,426 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:19,426 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:19,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,629 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:19,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-04-17 18:42:19,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:19,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129031830] [2020-04-17 18:42:19,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129031830] [2020-04-17 18:42:19,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270598612] [2020-04-17 18:42:19,695 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:19,739 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:19,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:19,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:19,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:19,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:19,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:19,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049926817] [2020-04-17 18:42:19,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:19,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:19,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:19,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:19,830 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-04-17 18:42:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:19,973 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-04-17 18:42:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:19,974 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:19,975 INFO L225 Difference]: With dead ends: 161 [2020-04-17 18:42:19,975 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:19,976 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-04-17 18:42:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-04-17 18:42:19,979 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-04-17 18:42:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:19,979 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-04-17 18:42:19,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-04-17 18:42:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:19,980 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:19,980 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:20,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,184 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:20,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-04-17 18:42:20,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:20,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463370188] [2020-04-17 18:42:20,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463370188] [2020-04-17 18:42:20,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140575121] [2020-04-17 18:42:20,242 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,284 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:20,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:20,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:20,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:20,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:20,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172181083] [2020-04-17 18:42:20,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:20,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:20,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:20,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:20,399 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-04-17 18:42:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:20,565 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-04-17 18:42:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:20,566 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:20,567 INFO L225 Difference]: With dead ends: 165 [2020-04-17 18:42:20,567 INFO L226 Difference]: Without dead ends: 163 [2020-04-17 18:42:20,568 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-04-17 18:42:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-04-17 18:42:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-04-17 18:42:20,572 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-04-17 18:42:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:20,572 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-04-17 18:42:20,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-04-17 18:42:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:20,573 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:20,573 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:20,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,776 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-04-17 18:42:20,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:20,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247909662] [2020-04-17 18:42:20,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247909662] [2020-04-17 18:42:20,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527990448] [2020-04-17 18:42:20,829 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:20,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:20,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:20,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:20,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:20,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449670372] [2020-04-17 18:42:20,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:20,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:20,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:20,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:20,961 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-04-17 18:42:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:21,158 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-04-17 18:42:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:21,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:21,159 INFO L225 Difference]: With dead ends: 167 [2020-04-17 18:42:21,160 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 18:42:21,160 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:21,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 18:42:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-04-17 18:42:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 18:42:21,164 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 18:42:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:21,164 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 18:42:21,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 18:42:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:21,165 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:21,165 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:21,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,367 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-04-17 18:42:21,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:21,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613544680] [2020-04-17 18:42:21,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613544680] [2020-04-17 18:42:21,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778250200] [2020-04-17 18:42:21,440 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:21,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:21,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:21,483 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:21,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:21,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:21,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:21,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414325130] [2020-04-17 18:42:21,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:21,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:21,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:21,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:21,568 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:21,814 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-04-17 18:42:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:21,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:21,816 INFO L225 Difference]: With dead ends: 168 [2020-04-17 18:42:21,816 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 18:42:21,817 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 18:42:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-04-17 18:42:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 18:42:21,820 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 18:42:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:21,820 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 18:42:21,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:21,820 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 18:42:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:21,820 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:21,820 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:22,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,024 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:22,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-04-17 18:42:22,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:22,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975768942] [2020-04-17 18:42:22,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975768942] [2020-04-17 18:42:22,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988508067] [2020-04-17 18:42:22,081 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:22,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:22,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:22,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:22,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:22,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:22,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452057423] [2020-04-17 18:42:22,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:22,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:22,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:22,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:22,211 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:22,406 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-04-17 18:42:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:22,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:22,408 INFO L225 Difference]: With dead ends: 160 [2020-04-17 18:42:22,408 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 18:42:22,409 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 18:42:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-04-17 18:42:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 18:42:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 18:42:22,412 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 18:42:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:22,412 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 18:42:22,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:22,413 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 18:42:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:22,413 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:22,413 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:22,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,617 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:22,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-04-17 18:42:22,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:22,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584560520] [2020-04-17 18:42:22,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584560520] [2020-04-17 18:42:22,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82506380] [2020-04-17 18:42:22,685 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:22,727 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:22,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:22,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:22,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:22,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:22,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:22,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:22,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846488051] [2020-04-17 18:42:22,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:22,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:22,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:22,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:22,800 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 18:42:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:23,119 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-04-17 18:42:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:23,119 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:23,121 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:42:23,121 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 18:42:23,121 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:42:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 18:42:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-04-17 18:42:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 18:42:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 18:42:23,125 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 18:42:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:23,126 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 18:42:23,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 18:42:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:23,126 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,126 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:23,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,330 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-04-17 18:42:23,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791759974] [2020-04-17 18:42:23,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791759974] [2020-04-17 18:42:23,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690530995] [2020-04-17 18:42:23,382 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,423 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:23,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:23,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:23,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:23,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:23,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159666551] [2020-04-17 18:42:23,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:23,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:23,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:23,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:23,501 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 18:42:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:23,734 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-04-17 18:42:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:42:23,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:23,736 INFO L225 Difference]: With dead ends: 169 [2020-04-17 18:42:23,736 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 18:42:23,737 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 18:42:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-04-17 18:42:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 18:42:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 18:42:23,741 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 18:42:23,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:23,741 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 18:42:23,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 18:42:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:23,741 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,741 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:23,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:23,942 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-04-17 18:42:23,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926291450] [2020-04-17 18:42:23,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926291450] [2020-04-17 18:42:24,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498116025] [2020-04-17 18:42:24,007 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,057 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:24,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:24,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:24,058 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:24,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:24,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:24,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847619419] [2020-04-17 18:42:24,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:24,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:24,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:24,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:24,146 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 18:42:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:24,474 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-04-17 18:42:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:42:24,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:24,477 INFO L225 Difference]: With dead ends: 192 [2020-04-17 18:42:24,477 INFO L226 Difference]: Without dead ends: 184 [2020-04-17 18:42:24,477 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:42:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-04-17 18:42:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-04-17 18:42:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 18:42:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-04-17 18:42:24,480 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-04-17 18:42:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:24,481 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-04-17 18:42:24,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-04-17 18:42:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:24,481 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:24,481 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:24,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,682 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-04-17 18:42:24,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:24,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276038879] [2020-04-17 18:42:24,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276038879] [2020-04-17 18:42:24,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499327734] [2020-04-17 18:42:24,746 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:24,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:42:24,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:24,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:24,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:24,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 18:42:24,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845739339] [2020-04-17 18:42:24,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:42:24,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:42:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:42:24,863 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-04-17 18:42:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:25,181 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-04-17 18:42:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:42:25,182 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 18:42:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:25,183 INFO L225 Difference]: With dead ends: 180 [2020-04-17 18:42:25,183 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 18:42:25,184 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:42:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 18:42:25,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-04-17 18:42:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 18:42:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-04-17 18:42:25,187 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-04-17 18:42:25,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:25,187 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-04-17 18:42:25,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:42:25,187 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-04-17 18:42:25,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:25,188 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:25,188 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:25,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:25,391 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:25,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:25,391 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-04-17 18:42:25,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:25,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930580598] [2020-04-17 18:42:25,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930580598] [2020-04-17 18:42:25,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111520336] [2020-04-17 18:42:25,473 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:25,514 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:25,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:25,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:25,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:25,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:25,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:25,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:42:25,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759689853] [2020-04-17 18:42:25,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:42:25,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:25,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:42:25,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:25,619 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-04-17 18:42:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:25,797 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-04-17 18:42:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:25,797 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-04-17 18:42:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:25,799 INFO L225 Difference]: With dead ends: 164 [2020-04-17 18:42:25,799 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 18:42:25,799 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 18:42:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 18:42:25,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 18:42:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-04-17 18:42:25,803 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-04-17 18:42:25,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:25,803 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-04-17 18:42:25,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:42:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-04-17 18:42:25,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:25,803 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:25,803 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:26,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,004 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-04-17 18:42:26,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:26,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670299880] [2020-04-17 18:42:26,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670299880] [2020-04-17 18:42:26,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999970245] [2020-04-17 18:42:26,178 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:26,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:26,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:26,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:26,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:26,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75245464] [2020-04-17 18:42:26,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:26,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:26,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:26,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,312 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-04-17 18:42:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:26,366 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 18:42:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:26,367 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:26,368 INFO L225 Difference]: With dead ends: 156 [2020-04-17 18:42:26,369 INFO L226 Difference]: Without dead ends: 153 [2020-04-17 18:42:26,369 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-04-17 18:42:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-04-17 18:42:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 18:42:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 18:42:26,372 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 18:42:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:26,372 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 18:42:26,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:26,373 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 18:42:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:26,373 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:26,373 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:26,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,577 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:26,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-04-17 18:42:26,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:26,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940358182] [2020-04-17 18:42:26,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940358182] [2020-04-17 18:42:26,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512676810] [2020-04-17 18:42:26,685 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:26,726 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:26,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:26,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:26,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:26,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:26,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:26,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625599083] [2020-04-17 18:42:26,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:26,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:26,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:26,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:26,829 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 18:42:26,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:26,910 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-04-17 18:42:26,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:26,910 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:26,911 INFO L225 Difference]: With dead ends: 170 [2020-04-17 18:42:26,912 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 18:42:26,912 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 18:42:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-04-17 18:42:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 18:42:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 18:42:26,915 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 18:42:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:26,915 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 18:42:26,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 18:42:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:26,916 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:26,916 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:27,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,118 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:27,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-04-17 18:42:27,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:27,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408683018] [2020-04-17 18:42:27,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408683018] [2020-04-17 18:42:27,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067148898] [2020-04-17 18:42:27,220 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,261 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:27,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:27,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:27,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:27,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:27,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414463441] [2020-04-17 18:42:27,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:27,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:27,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:27,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:27,358 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 18:42:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:27,450 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-04-17 18:42:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:27,450 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:27,452 INFO L225 Difference]: With dead ends: 169 [2020-04-17 18:42:27,452 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 18:42:27,452 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 18:42:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-04-17 18:42:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 18:42:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-04-17 18:42:27,456 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-04-17 18:42:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:27,457 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-04-17 18:42:27,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-04-17 18:42:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:27,457 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:27,457 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:27,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,661 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-04-17 18:42:27,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:27,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387743370] [2020-04-17 18:42:27,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387743370] [2020-04-17 18:42:27,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731846712] [2020-04-17 18:42:27,780 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:27,821 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:42:27,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:27,823 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:27,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:27,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:27,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:27,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087849159] [2020-04-17 18:42:27,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:27,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:27,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:27,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:27,942 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-04-17 18:42:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:28,073 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-04-17 18:42:28,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:28,074 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:28,075 INFO L225 Difference]: With dead ends: 168 [2020-04-17 18:42:28,075 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 18:42:28,075 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:28,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 18:42:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-04-17 18:42:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 18:42:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-04-17 18:42:28,079 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-04-17 18:42:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:28,079 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-04-17 18:42:28,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-04-17 18:42:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:28,080 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:28,080 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:28,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,281 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:28,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-04-17 18:42:28,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:28,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80348678] [2020-04-17 18:42:28,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80348678] [2020-04-17 18:42:28,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558814851] [2020-04-17 18:42:28,392 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:28,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:28,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:28,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:28,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:28,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662752203] [2020-04-17 18:42:28,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:28,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:28,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:28,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:28,627 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-04-17 18:42:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:28,797 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-04-17 18:42:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:28,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:28,798 INFO L225 Difference]: With dead ends: 167 [2020-04-17 18:42:28,799 INFO L226 Difference]: Without dead ends: 164 [2020-04-17 18:42:28,799 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-04-17 18:42:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-04-17 18:42:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 18:42:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-04-17 18:42:28,802 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-04-17 18:42:28,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:28,803 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-04-17 18:42:28,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-04-17 18:42:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:42:28,803 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:28,804 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:29,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,008 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:29,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-04-17 18:42:29,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:29,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237403472] [2020-04-17 18:42:29,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237403472] [2020-04-17 18:42:29,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102375999] [2020-04-17 18:42:29,075 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:29,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:29,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:29,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:29,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:42:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:29,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:29,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079567442] [2020-04-17 18:42:29,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:29,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:29,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:29,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,232 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-04-17 18:42:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:29,418 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-04-17 18:42:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:29,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 18:42:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:29,420 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:29,420 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 18:42:29,420 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 18:42:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-04-17 18:42:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 18:42:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-04-17 18:42:29,424 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-04-17 18:42:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:29,424 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-04-17 18:42:29,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-04-17 18:42:29,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:29,424 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:29,425 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:29,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,625 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:29,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-04-17 18:42:29,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:29,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57815834] [2020-04-17 18:42:29,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57815834] [2020-04-17 18:42:29,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57489099] [2020-04-17 18:42:29,718 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:29,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:29,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:29,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:29,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:29,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:29,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:29,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411431381] [2020-04-17 18:42:29,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:29,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:29,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:29,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,863 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-04-17 18:42:29,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:29,919 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-04-17 18:42:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:42:29,919 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:29,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:29,921 INFO L225 Difference]: With dead ends: 163 [2020-04-17 18:42:29,922 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 18:42:29,922 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 18:42:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-04-17 18:42:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 18:42:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-04-17 18:42:29,925 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-04-17 18:42:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:29,926 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-04-17 18:42:29,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-04-17 18:42:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:29,926 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:29,927 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:30,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:30,130 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:30,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-04-17 18:42:30,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:30,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110518102] [2020-04-17 18:42:30,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110518102] [2020-04-17 18:42:30,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764593015] [2020-04-17 18:42:30,224 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:30,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:30,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:30,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:30,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:30,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:30,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42222094] [2020-04-17 18:42:30,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:30,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:30,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:30,396 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:30,534 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-04-17 18:42:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:30,534 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:30,535 INFO L225 Difference]: With dead ends: 172 [2020-04-17 18:42:30,535 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 18:42:30,535 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:42:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 18:42:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-04-17 18:42:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 18:42:30,538 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 18:42:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:30,539 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 18:42:30,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 18:42:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:30,540 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:30,540 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:30,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:30,744 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:30,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-04-17 18:42:30,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:30,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898082024] [2020-04-17 18:42:30,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898082024] [2020-04-17 18:42:30,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021124446] [2020-04-17 18:42:30,818 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:30,861 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:30,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:30,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:30,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:30,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:30,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:30,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469431299] [2020-04-17 18:42:30,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:30,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:30,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:30,984 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 18:42:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:31,177 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 18:42:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:31,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:31,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:31,180 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:31,180 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:31,180 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-04-17 18:42:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 18:42:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-04-17 18:42:31,184 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-04-17 18:42:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:31,184 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-04-17 18:42:31,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-04-17 18:42:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:31,184 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:31,185 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:31,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:31,389 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-04-17 18:42:31,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:31,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42752927] [2020-04-17 18:42:31,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:31,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42752927] [2020-04-17 18:42:31,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527066866] [2020-04-17 18:42:31,477 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:31,531 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:31,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:31,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:31,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:31,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:31,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:31,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381804655] [2020-04-17 18:42:31,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:31,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:31,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:31,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:31,674 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-04-17 18:42:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:31,922 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 18:42:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:31,923 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:31,925 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:31,925 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:31,926 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-04-17 18:42:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 18:42:31,931 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 18:42:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:31,931 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 18:42:31,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 18:42:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:31,932 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:31,932 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:32,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:32,133 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:32,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:32,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-04-17 18:42:32,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:32,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541771431] [2020-04-17 18:42:32,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:32,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541771431] [2020-04-17 18:42:32,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300649655] [2020-04-17 18:42:32,256 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:32,322 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:32,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:32,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:32,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:32,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:32,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:32,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414430166] [2020-04-17 18:42:32,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:32,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:32,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:32,483 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 18:42:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:32,752 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-04-17 18:42:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:32,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:32,754 INFO L225 Difference]: With dead ends: 184 [2020-04-17 18:42:32,754 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 18:42:32,755 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 18:42:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-04-17 18:42:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:42:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-04-17 18:42:32,760 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-04-17 18:42:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:32,760 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-04-17 18:42:32,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-04-17 18:42:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:32,762 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:32,762 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:32,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:32,966 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:32,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:32,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-04-17 18:42:32,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:32,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636202369] [2020-04-17 18:42:32,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:33,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636202369] [2020-04-17 18:42:33,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049061095] [2020-04-17 18:42:33,042 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:33,082 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:33,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:33,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:33,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:33,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874000670] [2020-04-17 18:42:33,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:33,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:33,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:33,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:33,616 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-04-17 18:42:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:33,824 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-04-17 18:42:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:33,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:33,826 INFO L225 Difference]: With dead ends: 179 [2020-04-17 18:42:33,826 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 18:42:33,827 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 18:42:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-04-17 18:42:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-04-17 18:42:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-04-17 18:42:33,831 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-04-17 18:42:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:33,831 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-04-17 18:42:33,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:33,831 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-04-17 18:42:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:33,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:33,832 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:34,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:34,035 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:34,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-04-17 18:42:34,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:34,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375852358] [2020-04-17 18:42:34,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:34,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375852358] [2020-04-17 18:42:34,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94380256] [2020-04-17 18:42:34,116 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:34,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:34,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:34,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:34,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:34,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:34,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:34,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639731342] [2020-04-17 18:42:34,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:34,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:34,267 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-04-17 18:42:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:34,421 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-04-17 18:42:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:34,421 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:34,423 INFO L225 Difference]: With dead ends: 176 [2020-04-17 18:42:34,423 INFO L226 Difference]: Without dead ends: 174 [2020-04-17 18:42:34,423 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-04-17 18:42:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-04-17 18:42:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:42:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-04-17 18:42:34,427 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-04-17 18:42:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:34,427 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-04-17 18:42:34,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-04-17 18:42:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:34,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:34,428 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:34,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:34,631 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:34,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-04-17 18:42:34,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:34,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495727761] [2020-04-17 18:42:34,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:34,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495727761] [2020-04-17 18:42:34,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727059211] [2020-04-17 18:42:34,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:34,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:42:34,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:34,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:34,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:35,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:35,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:35,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956164100] [2020-04-17 18:42:35,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:35,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:35,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:35,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:35,370 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-04-17 18:42:35,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:35,568 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 18:42:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:35,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:35,570 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:35,570 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:35,570 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-04-17 18:42:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-04-17 18:42:35,573 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-04-17 18:42:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:35,574 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-04-17 18:42:35,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-04-17 18:42:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:35,574 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:35,574 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:35,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:35,776 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:35,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:35,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-04-17 18:42:35,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:35,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082777757] [2020-04-17 18:42:35,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:35,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082777757] [2020-04-17 18:42:35,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925389613] [2020-04-17 18:42:35,906 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:35,971 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:35,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:35,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:35,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:36,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:36,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:36,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884211749] [2020-04-17 18:42:36,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:36,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:36,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:36,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:36,095 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-04-17 18:42:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:36,285 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 18:42:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:42:36,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:36,287 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:36,287 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:36,287 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-04-17 18:42:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 18:42:36,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-04-17 18:42:36,291 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-04-17 18:42:36,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:36,291 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-04-17 18:42:36,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-04-17 18:42:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:36,292 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:36,292 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:36,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:36,496 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-04-17 18:42:36,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:36,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113462553] [2020-04-17 18:42:36,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:36,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113462553] [2020-04-17 18:42:36,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451524201] [2020-04-17 18:42:36,656 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:36,721 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:36,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:36,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:36,723 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:36,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:36,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:36,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377623763] [2020-04-17 18:42:36,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:36,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:36,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:36,881 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-04-17 18:42:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:36,967 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-04-17 18:42:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:42:36,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:36,969 INFO L225 Difference]: With dead ends: 182 [2020-04-17 18:42:36,969 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 18:42:36,970 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:42:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 18:42:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-04-17 18:42:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:42:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-04-17 18:42:36,976 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-04-17 18:42:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:36,977 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-04-17 18:42:36,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-04-17 18:42:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:36,978 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:36,978 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:37,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:37,182 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:37,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:37,182 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-04-17 18:42:37,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:37,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157619686] [2020-04-17 18:42:37,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:37,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157619686] [2020-04-17 18:42:37,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332006319] [2020-04-17 18:42:37,292 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:37,335 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:37,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:37,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:37,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:37,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:37,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:37,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895806545] [2020-04-17 18:42:37,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:37,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:37,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:37,445 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-04-17 18:42:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:37,626 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-04-17 18:42:37,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:42:37,627 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:37,628 INFO L225 Difference]: With dead ends: 185 [2020-04-17 18:42:37,629 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 18:42:37,629 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:42:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 18:42:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-04-17 18:42:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 18:42:37,633 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 18:42:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:37,633 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 18:42:37,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 18:42:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:37,634 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:37,634 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:37,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:37,837 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:37,837 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-04-17 18:42:37,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:37,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517860316] [2020-04-17 18:42:37,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:37,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517860316] [2020-04-17 18:42:37,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447710795] [2020-04-17 18:42:37,924 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:37,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:37,964 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:44,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:44,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:42:44,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707215462] [2020-04-17 18:42:44,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:42:44,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:44,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:42:44,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=169, Unknown=3, NotChecked=0, Total=240 [2020-04-17 18:42:44,336 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 16 states. [2020-04-17 18:42:46,615 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 24 [2020-04-17 18:42:54,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:54,752 INFO L93 Difference]: Finished difference Result 199 states and 467 transitions. [2020-04-17 18:42:54,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:54,753 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:42:54,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:54,754 INFO L225 Difference]: With dead ends: 199 [2020-04-17 18:42:54,755 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 18:42:54,755 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=153, Invalid=306, Unknown=3, NotChecked=0, Total=462 [2020-04-17 18:42:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 18:42:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 140. [2020-04-17 18:42:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-04-17 18:42:54,758 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-04-17 18:42:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:54,758 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-04-17 18:42:54,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:42:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-04-17 18:42:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:54,759 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:54,759 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:54,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:54,961 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-04-17 18:42:54,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:54,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412446844] [2020-04-17 18:42:54,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:55,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412446844] [2020-04-17 18:42:55,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825415473] [2020-04-17 18:42:55,050 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:55,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:55,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:55,091 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:55,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:55,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:55,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:55,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616767384] [2020-04-17 18:42:55,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:55,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:55,201 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-04-17 18:42:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:55,440 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-04-17 18:42:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:55,441 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:55,442 INFO L225 Difference]: With dead ends: 187 [2020-04-17 18:42:55,442 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 18:42:55,442 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 18:42:55,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-04-17 18:42:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 18:42:55,446 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 18:42:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:55,447 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 18:42:55,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 18:42:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:55,448 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:55,448 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:55,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:55,649 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-04-17 18:42:55,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:55,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158649716] [2020-04-17 18:42:55,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:55,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158649716] [2020-04-17 18:42:55,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908916250] [2020-04-17 18:42:55,743 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:55,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:42:55,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:55,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:55,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:55,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:55,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:55,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369568040] [2020-04-17 18:42:55,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:55,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:55,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:55,879 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 18:42:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:56,123 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-04-17 18:42:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:56,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:56,126 INFO L225 Difference]: With dead ends: 198 [2020-04-17 18:42:56,126 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:42:56,126 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:42:56,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-04-17 18:42:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-04-17 18:42:56,130 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-04-17 18:42:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:56,130 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-04-17 18:42:56,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-04-17 18:42:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:56,131 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:56,131 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:56,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:56,332 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-04-17 18:42:56,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:56,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054183968] [2020-04-17 18:42:56,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:56,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054183968] [2020-04-17 18:42:56,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945661278] [2020-04-17 18:42:56,429 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:56,485 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:42:56,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:56,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:56,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:57,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:57,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:57,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247487517] [2020-04-17 18:42:57,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:57,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:57,023 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-04-17 18:42:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:57,285 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-04-17 18:42:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:42:57,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:57,288 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:42:57,288 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 18:42:57,288 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:42:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 18:42:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-04-17 18:42:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:42:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-04-17 18:42:57,297 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-04-17 18:42:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:57,297 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-04-17 18:42:57,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-04-17 18:42:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:57,298 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:57,298 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:57,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:57,499 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:57,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:57,499 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-04-17 18:42:57,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:57,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182013151] [2020-04-17 18:42:57,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:57,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182013151] [2020-04-17 18:42:57,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252381084] [2020-04-17 18:42:57,605 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:57,645 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:42:57,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:57,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:57,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:57,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:57,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:57,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658648217] [2020-04-17 18:42:57,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:57,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:57,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:57,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:57,765 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-04-17 18:42:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:57,868 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-04-17 18:42:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:42:57,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:57,871 INFO L225 Difference]: With dead ends: 178 [2020-04-17 18:42:57,871 INFO L226 Difference]: Without dead ends: 176 [2020-04-17 18:42:57,871 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:42:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-17 18:42:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-17 18:42:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:42:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-04-17 18:42:57,875 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-04-17 18:42:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:57,875 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-04-17 18:42:57,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-04-17 18:42:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:57,875 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:57,875 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:58,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:58,076 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-04-17 18:42:58,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:58,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188648738] [2020-04-17 18:42:58,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:58,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188648738] [2020-04-17 18:42:58,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483529882] [2020-04-17 18:42:58,167 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:58,212 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:42:58,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:58,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:58,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:58,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:58,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:58,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661957236] [2020-04-17 18:42:58,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:58,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:58,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:58,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:58,324 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-04-17 18:42:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:58,508 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-04-17 18:42:58,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:58,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:58,510 INFO L225 Difference]: With dead ends: 193 [2020-04-17 18:42:58,510 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 18:42:58,511 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:42:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 18:42:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-04-17 18:42:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:42:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-04-17 18:42:58,514 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-04-17 18:42:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:58,514 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-04-17 18:42:58,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-04-17 18:42:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:58,515 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:58,515 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:58,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:58,716 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-04-17 18:42:58,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:58,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762209187] [2020-04-17 18:42:58,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:58,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762209187] [2020-04-17 18:42:58,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105503672] [2020-04-17 18:42:58,799 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:58,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:58,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:58,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:58,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:58,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695534690] [2020-04-17 18:42:58,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:58,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:58,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:58,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:58,959 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-04-17 18:42:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:59,211 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 18:42:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:42:59,212 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:59,213 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:42:59,214 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:42:59,214 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:42:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:42:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-04-17 18:42:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:42:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-04-17 18:42:59,217 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-04-17 18:42:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:59,218 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-04-17 18:42:59,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-04-17 18:42:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:59,218 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:59,218 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:59,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:59,419 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:59,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:59,420 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-04-17 18:42:59,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:59,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806061845] [2020-04-17 18:42:59,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:59,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806061845] [2020-04-17 18:42:59,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113285296] [2020-04-17 18:42:59,505 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:59,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:42:59,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:42:59,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:42:59,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:59,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:59,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:42:59,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982627924] [2020-04-17 18:42:59,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:42:59,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:42:59,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:42:59,698 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-04-17 18:42:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:59,814 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-04-17 18:42:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:42:59,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:42:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:59,816 INFO L225 Difference]: With dead ends: 174 [2020-04-17 18:42:59,816 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 18:42:59,817 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:42:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 18:42:59,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-04-17 18:42:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:42:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-04-17 18:42:59,820 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-04-17 18:42:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:59,821 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-04-17 18:42:59,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:42:59,821 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-04-17 18:42:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:42:59,821 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:59,821 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:00,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:00,022 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:00,023 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-04-17 18:43:00,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:00,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725991871] [2020-04-17 18:43:00,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:00,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725991871] [2020-04-17 18:43:00,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593915724] [2020-04-17 18:43:00,099 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:00,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:00,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:00,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:00,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:00,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:00,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:00,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747021460] [2020-04-17 18:43:00,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:00,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:00,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:00,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:00,248 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-04-17 18:43:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:00,464 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-04-17 18:43:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:00,464 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:00,466 INFO L225 Difference]: With dead ends: 189 [2020-04-17 18:43:00,466 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 18:43:00,466 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:00,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 18:43:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-04-17 18:43:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-04-17 18:43:00,470 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-04-17 18:43:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:00,470 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-04-17 18:43:00,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-04-17 18:43:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:00,470 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:00,471 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:00,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:00,671 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:00,672 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-04-17 18:43:00,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:00,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759846417] [2020-04-17 18:43:00,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:00,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759846417] [2020-04-17 18:43:00,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511487310] [2020-04-17 18:43:00,761 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:00,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:00,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:00,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:00,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:00,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:00,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:00,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542763297] [2020-04-17 18:43:00,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:00,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:00,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:00,925 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-04-17 18:43:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:01,068 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-04-17 18:43:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:43:01,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:01,070 INFO L225 Difference]: With dead ends: 175 [2020-04-17 18:43:01,070 INFO L226 Difference]: Without dead ends: 173 [2020-04-17 18:43:01,070 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:43:01,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-04-17 18:43:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-04-17 18:43:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:43:01,073 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:43:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:01,073 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:43:01,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:43:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:01,074 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:01,074 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:01,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:01,275 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-04-17 18:43:01,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:01,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144919657] [2020-04-17 18:43:01,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:01,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144919657] [2020-04-17 18:43:01,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887736881] [2020-04-17 18:43:01,339 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:01,381 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:01,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:01,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:01,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:01,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:01,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:01,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:01,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185128638] [2020-04-17 18:43:01,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:01,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:01,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:01,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:01,490 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:43:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:01,809 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-04-17 18:43:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:01,810 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:01,812 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:43:01,812 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 18:43:01,812 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 18:43:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-04-17 18:43:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 18:43:01,817 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 18:43:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:01,817 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 18:43:01,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 18:43:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:01,818 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:01,818 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:02,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,021 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-04-17 18:43:02,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:02,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207976802] [2020-04-17 18:43:02,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207976802] [2020-04-17 18:43:02,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023881278] [2020-04-17 18:43:02,080 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,122 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:02,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:02,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:02,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:02,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:02,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123470712] [2020-04-17 18:43:02,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:02,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:02,237 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 18:43:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:02,485 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-04-17 18:43:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:43:02,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:02,488 INFO L225 Difference]: With dead ends: 187 [2020-04-17 18:43:02,488 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 18:43:02,488 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 18:43:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-04-17 18:43:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:43:02,492 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:43:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:02,492 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:43:02,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:43:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:02,493 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:02,493 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:02,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,696 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-04-17 18:43:02,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:02,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558410659] [2020-04-17 18:43:02,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558410659] [2020-04-17 18:43:02,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552064191] [2020-04-17 18:43:02,786 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:02,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:03,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:03,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:03,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:03,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944464330] [2020-04-17 18:43:03,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:03,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:03,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:03,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=139, Unknown=1, NotChecked=0, Total=210 [2020-04-17 18:43:03,507 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:43:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:03,951 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-04-17 18:43:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:03,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:03,952 INFO L225 Difference]: With dead ends: 212 [2020-04-17 18:43:03,952 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:43:03,952 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=505, Unknown=1, NotChecked=0, Total=756 [2020-04-17 18:43:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:43:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 18:43:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:43:03,956 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:43:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:03,956 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:43:03,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:43:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:03,957 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:03,957 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:04,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:04,157 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-04-17 18:43:04,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:04,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461915350] [2020-04-17 18:43:04,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:04,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461915350] [2020-04-17 18:43:04,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122985812] [2020-04-17 18:43:04,239 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:04,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:04,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:04,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:04,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:04,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:05,710 WARN L192 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2020-04-17 18:43:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:05,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:05,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:43:05,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742714392] [2020-04-17 18:43:05,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:05,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:43:05,713 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 16 states. [2020-04-17 18:43:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:06,070 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 18:43:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:06,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:43:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:06,072 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:06,073 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 18:43:06,073 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=208, Invalid=441, Unknown=1, NotChecked=0, Total=650 [2020-04-17 18:43:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 18:43:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-04-17 18:43:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-04-17 18:43:06,077 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-04-17 18:43:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:06,077 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-04-17 18:43:06,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-04-17 18:43:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:06,078 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:06,078 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:06,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:06,278 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:06,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-04-17 18:43:06,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:06,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101532727] [2020-04-17 18:43:06,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:06,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101532727] [2020-04-17 18:43:06,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860467384] [2020-04-17 18:43:06,354 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:06,396 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:06,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:06,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:06,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:06,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:06,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:06,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887842524] [2020-04-17 18:43:06,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:06,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:06,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:06,549 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-04-17 18:43:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:06,823 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-04-17 18:43:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:06,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:06,826 INFO L225 Difference]: With dead ends: 198 [2020-04-17 18:43:06,826 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 18:43:06,826 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 18:43:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-04-17 18:43:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 18:43:06,831 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 18:43:06,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:06,831 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 18:43:06,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 18:43:06,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:06,832 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:06,832 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:07,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:07,034 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-04-17 18:43:07,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:07,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784059234] [2020-04-17 18:43:07,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:07,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784059234] [2020-04-17 18:43:07,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736788413] [2020-04-17 18:43:07,099 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:07,141 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:07,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:07,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:07,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:09,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:09,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:09,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435563488] [2020-04-17 18:43:09,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:09,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:09,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:09,332 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 18:43:09,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:09,716 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-04-17 18:43:09,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:43:09,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:09,718 INFO L225 Difference]: With dead ends: 209 [2020-04-17 18:43:09,718 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:43:09,718 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:43:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:43:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 18:43:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 18:43:09,721 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 18:43:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:09,721 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 18:43:09,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 18:43:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:09,722 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:09,722 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:09,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:09,923 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-04-17 18:43:09,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:09,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272643067] [2020-04-17 18:43:09,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:10,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272643067] [2020-04-17 18:43:10,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374193735] [2020-04-17 18:43:10,002 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:10,041 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:10,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:10,042 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:10,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:10,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:10,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:10,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:10,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991988804] [2020-04-17 18:43:10,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:10,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:10,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:10,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:10,197 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 18:43:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:10,806 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-04-17 18:43:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:10,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:10,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:10,808 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:43:10,808 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:43:10,809 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:43:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:43:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-04-17 18:43:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 18:43:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-04-17 18:43:10,813 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-04-17 18:43:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:10,813 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-04-17 18:43:10,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-04-17 18:43:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:10,814 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:10,814 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:11,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:11,018 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:11,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:11,018 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-04-17 18:43:11,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:11,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81102009] [2020-04-17 18:43:11,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81102009] [2020-04-17 18:43:11,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484210390] [2020-04-17 18:43:11,082 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:11,125 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:11,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:11,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:11,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:11,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:11,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:11,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:11,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647638876] [2020-04-17 18:43:11,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:11,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:11,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:11,256 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-04-17 18:43:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:11,842 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-04-17 18:43:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:11,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:11,844 INFO L225 Difference]: With dead ends: 236 [2020-04-17 18:43:11,844 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 18:43:11,844 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 18:43:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-04-17 18:43:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-04-17 18:43:11,848 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-04-17 18:43:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:11,848 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-04-17 18:43:11,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-04-17 18:43:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:11,849 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:11,849 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:12,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:12,053 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-04-17 18:43:12,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:12,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168670318] [2020-04-17 18:43:12,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:12,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168670318] [2020-04-17 18:43:12,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955445521] [2020-04-17 18:43:12,136 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:12,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:12,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:12,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:12,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:12,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:12,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43052334] [2020-04-17 18:43:12,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:12,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:12,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:12,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:12,312 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-04-17 18:43:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:12,802 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 18:43:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:12,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:12,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:12,804 INFO L225 Difference]: With dead ends: 219 [2020-04-17 18:43:12,804 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 18:43:12,805 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:43:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 18:43:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-04-17 18:43:12,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-04-17 18:43:12,809 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-04-17 18:43:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:12,809 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-04-17 18:43:12,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-04-17 18:43:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:12,810 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:12,810 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:13,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:13,013 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-04-17 18:43:13,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:13,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002455985] [2020-04-17 18:43:13,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002455985] [2020-04-17 18:43:13,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184794095] [2020-04-17 18:43:13,077 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:13,118 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:13,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:13,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:13,120 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:13,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:13,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774943599] [2020-04-17 18:43:13,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:13,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:13,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:13,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:13,257 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:13,516 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-04-17 18:43:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:13,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:13,517 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:43:13,517 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 18:43:13,518 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 18:43:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-04-17 18:43:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-04-17 18:43:13,521 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-04-17 18:43:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:13,522 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-04-17 18:43:13,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-04-17 18:43:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:13,525 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:13,525 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:13,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:13,729 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:13,730 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-04-17 18:43:13,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:13,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896373869] [2020-04-17 18:43:13,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896373869] [2020-04-17 18:43:13,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407692479] [2020-04-17 18:43:13,806 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:13,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:13,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:13,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:13,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:13,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:13,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:13,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937979904] [2020-04-17 18:43:13,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:13,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:13,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:13,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:13,948 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-04-17 18:43:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:14,191 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-04-17 18:43:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:14,192 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:14,192 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:14,193 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 18:43:14,193 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 18:43:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-04-17 18:43:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-04-17 18:43:14,197 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-04-17 18:43:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:14,197 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-04-17 18:43:14,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-04-17 18:43:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:14,197 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:14,197 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:14,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,398 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:14,399 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-04-17 18:43:14,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:14,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369191868] [2020-04-17 18:43:14,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:14,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369191868] [2020-04-17 18:43:14,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262828618] [2020-04-17 18:43:14,463 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:14,504 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:14,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:14,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:14,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:15,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:15,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:15,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051537086] [2020-04-17 18:43:15,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:15,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:15,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:15,040 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-04-17 18:43:15,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:15,302 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-04-17 18:43:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:15,302 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:15,303 INFO L225 Difference]: With dead ends: 197 [2020-04-17 18:43:15,303 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 18:43:15,304 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 18:43:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-04-17 18:43:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-04-17 18:43:15,307 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-04-17 18:43:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:15,307 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-04-17 18:43:15,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:15,307 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-04-17 18:43:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:15,307 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:15,307 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:15,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:15,510 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:15,511 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-04-17 18:43:15,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:15,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150512010] [2020-04-17 18:43:15,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:15,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150512010] [2020-04-17 18:43:15,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251764471] [2020-04-17 18:43:15,573 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:15,615 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:15,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:15,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:15,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:15,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:15,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:15,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534842092] [2020-04-17 18:43:15,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:15,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:15,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:15,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:15,727 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-04-17 18:43:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:16,103 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-04-17 18:43:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:43:16,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:16,104 INFO L225 Difference]: With dead ends: 214 [2020-04-17 18:43:16,105 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 18:43:16,105 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 18:43:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-04-17 18:43:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-04-17 18:43:16,109 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-04-17 18:43:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:16,110 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-04-17 18:43:16,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-04-17 18:43:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:16,110 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:16,110 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:16,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:16,313 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:16,314 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-04-17 18:43:16,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:16,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022600442] [2020-04-17 18:43:16,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:16,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022600442] [2020-04-17 18:43:16,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90923224] [2020-04-17 18:43:16,397 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:16,457 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:16,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:16,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:16,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:16,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:16,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:16,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981855287] [2020-04-17 18:43:16,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:16,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:16,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:16,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:16,568 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-04-17 18:43:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:16,924 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-04-17 18:43:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:16,925 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:16,926 INFO L225 Difference]: With dead ends: 217 [2020-04-17 18:43:16,926 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 18:43:16,926 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 18:43:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 18:43:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 18:43:16,930 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 18:43:16,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:16,930 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 18:43:16,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 18:43:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:16,930 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:16,930 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:17,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:17,131 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:17,132 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-04-17 18:43:17,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:17,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383571808] [2020-04-17 18:43:17,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:17,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383571808] [2020-04-17 18:43:17,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713742905] [2020-04-17 18:43:17,198 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:17,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:17,240 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:17,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:17,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:17,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405267985] [2020-04-17 18:43:17,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:17,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:17,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:17,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:17,343 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:17,714 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-04-17 18:43:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:17,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:17,715 INFO L225 Difference]: With dead ends: 211 [2020-04-17 18:43:17,715 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 18:43:17,716 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:17,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 18:43:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-04-17 18:43:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:17,720 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:17,721 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:17,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:17,721 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:17,721 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:17,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:17,922 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:17,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:17,923 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-04-17 18:43:17,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:17,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838170424] [2020-04-17 18:43:17,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:17,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838170424] [2020-04-17 18:43:17,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526208660] [2020-04-17 18:43:17,985 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:18,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:18,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:18,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:18,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:18,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:18,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:18,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:18,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428316810] [2020-04-17 18:43:18,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:18,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:18,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:18,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:18,108 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:18,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:18,578 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-04-17 18:43:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:18,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:18,580 INFO L225 Difference]: With dead ends: 211 [2020-04-17 18:43:18,580 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 18:43:18,580 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:43:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 18:43:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-04-17 18:43:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:18,583 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:18,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:18,584 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:18,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:18,584 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:18,584 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:18,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:18,788 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:18,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:18,788 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-04-17 18:43:18,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:18,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218631377] [2020-04-17 18:43:18,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:18,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218631377] [2020-04-17 18:43:18,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553313300] [2020-04-17 18:43:18,876 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:18,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:43:18,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:18,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:18,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:19,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:19,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:19,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:19,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091860401] [2020-04-17 18:43:19,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:19,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:19,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:19,044 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:19,527 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-04-17 18:43:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:43:19,528 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:19,529 INFO L225 Difference]: With dead ends: 227 [2020-04-17 18:43:19,529 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 18:43:19,529 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:43:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 18:43:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-04-17 18:43:19,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 18:43:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 18:43:19,533 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 18:43:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:19,533 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 18:43:19,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 18:43:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:19,534 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:19,534 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:19,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:19,734 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:19,735 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-04-17 18:43:19,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:19,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473945823] [2020-04-17 18:43:19,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:19,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473945823] [2020-04-17 18:43:19,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436824183] [2020-04-17 18:43:19,798 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:19,838 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:19,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:19,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:19,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:19,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:19,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:19,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873427069] [2020-04-17 18:43:19,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:19,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:19,925 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:20,329 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-04-17 18:43:20,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:43:20,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:20,331 INFO L225 Difference]: With dead ends: 221 [2020-04-17 18:43:20,331 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 18:43:20,331 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 18:43:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-04-17 18:43:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 18:43:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 18:43:20,335 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 18:43:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:20,335 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 18:43:20,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 18:43:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:20,335 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:20,335 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:20,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:20,536 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:20,537 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-04-17 18:43:20,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:20,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578101947] [2020-04-17 18:43:20,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:20,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578101947] [2020-04-17 18:43:20,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701411353] [2020-04-17 18:43:20,605 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:20,649 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:20,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:20,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:20,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:20,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:20,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:20,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:20,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344037047] [2020-04-17 18:43:20,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:20,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:20,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:20,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:20,756 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 18:43:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:21,280 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-04-17 18:43:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:21,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:21,282 INFO L225 Difference]: With dead ends: 240 [2020-04-17 18:43:21,282 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 18:43:21,282 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 18:43:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-04-17 18:43:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 18:43:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-04-17 18:43:21,286 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-04-17 18:43:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:21,286 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-04-17 18:43:21,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-04-17 18:43:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:21,287 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:21,287 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:21,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:21,487 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:21,488 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-04-17 18:43:21,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:21,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004525142] [2020-04-17 18:43:21,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:21,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004525142] [2020-04-17 18:43:21,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706486376] [2020-04-17 18:43:21,552 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:21,590 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:43:21,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:21,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:21,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:21,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:21,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:21,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:21,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762559159] [2020-04-17 18:43:21,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:21,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:21,673 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-04-17 18:43:22,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:22,212 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-04-17 18:43:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:22,213 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:22,213 INFO L225 Difference]: With dead ends: 238 [2020-04-17 18:43:22,214 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 18:43:22,214 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 18:43:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-04-17 18:43:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 18:43:22,218 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 18:43:22,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:22,218 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 18:43:22,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 18:43:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:22,219 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:22,219 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:22,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:22,422 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:22,422 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-04-17 18:43:22,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:22,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447131861] [2020-04-17 18:43:22,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:22,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447131861] [2020-04-17 18:43:22,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967005094] [2020-04-17 18:43:22,505 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:22,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:22,561 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:23,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:23,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:23,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728927607] [2020-04-17 18:43:23,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:23,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:23,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:23,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:23,115 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 18:43:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:23,355 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-04-17 18:43:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:23,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:23,356 INFO L225 Difference]: With dead ends: 195 [2020-04-17 18:43:23,357 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 18:43:23,357 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 18:43:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-04-17 18:43:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 18:43:23,360 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 18:43:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:23,360 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 18:43:23,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 18:43:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:23,361 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:23,361 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:23,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:23,562 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:23,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:23,562 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-04-17 18:43:23,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:23,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375268190] [2020-04-17 18:43:23,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:23,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375268190] [2020-04-17 18:43:23,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825407078] [2020-04-17 18:43:23,630 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:23,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:23,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:23,669 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:23,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:23,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:23,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:23,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767436608] [2020-04-17 18:43:23,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:23,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:23,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:23,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:23,782 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 18:43:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:24,188 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-04-17 18:43:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:43:24,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:24,190 INFO L225 Difference]: With dead ends: 206 [2020-04-17 18:43:24,190 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 18:43:24,190 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 18:43:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-04-17 18:43:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 18:43:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-04-17 18:43:24,193 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-04-17 18:43:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:24,194 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-04-17 18:43:24,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-04-17 18:43:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:24,194 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:24,194 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:24,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:24,395 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:24,395 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-04-17 18:43:24,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:24,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640573336] [2020-04-17 18:43:24,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:24,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640573336] [2020-04-17 18:43:24,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472585442] [2020-04-17 18:43:24,459 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:24,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:24,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:24,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:24,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:24,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:25,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:25,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:43:25,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033610119] [2020-04-17 18:43:25,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:25,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:25,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:25,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:43:25,006 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-04-17 18:43:25,860 WARN L192 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-17 18:43:26,745 WARN L192 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-04-17 18:43:30,218 WARN L192 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-17 18:43:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:34,929 INFO L93 Difference]: Finished difference Result 243 states and 575 transitions. [2020-04-17 18:43:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 18:43:34,930 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:43:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:34,931 INFO L225 Difference]: With dead ends: 243 [2020-04-17 18:43:34,931 INFO L226 Difference]: Without dead ends: 238 [2020-04-17 18:43:34,932 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=375, Invalid=881, Unknown=4, NotChecked=0, Total=1260 [2020-04-17 18:43:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-04-17 18:43:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-04-17 18:43:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-04-17 18:43:34,935 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-04-17 18:43:34,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:34,936 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-04-17 18:43:34,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-04-17 18:43:34,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:34,936 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:34,936 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:35,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:35,139 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:35,140 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-04-17 18:43:35,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:35,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557776511] [2020-04-17 18:43:35,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:35,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557776511] [2020-04-17 18:43:35,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859961986] [2020-04-17 18:43:35,212 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:35,267 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:35,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:35,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:35,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:35,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:35,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:35,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388927559] [2020-04-17 18:43:35,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:35,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:35,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:35,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:35,378 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-04-17 18:43:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:35,564 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 18:43:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:35,565 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:35,566 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:43:35,566 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:43:35,566 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:43:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:43:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-04-17 18:43:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-04-17 18:43:35,569 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-04-17 18:43:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:35,570 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-04-17 18:43:35,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-04-17 18:43:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:35,570 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:35,570 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:35,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:35,771 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-04-17 18:43:35,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:35,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496038744] [2020-04-17 18:43:35,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:35,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496038744] [2020-04-17 18:43:35,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551735084] [2020-04-17 18:43:35,860 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:35,911 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:35,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:35,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:35,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:36,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:36,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:36,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084424916] [2020-04-17 18:43:36,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:36,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:36,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:36,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:36,482 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-04-17 18:43:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:36,735 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-04-17 18:43:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:36,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:36,736 INFO L225 Difference]: With dead ends: 205 [2020-04-17 18:43:36,736 INFO L226 Difference]: Without dead ends: 203 [2020-04-17 18:43:36,737 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-04-17 18:43:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-04-17 18:43:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-04-17 18:43:36,741 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-04-17 18:43:36,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:36,741 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-04-17 18:43:36,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-04-17 18:43:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:36,742 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:36,742 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:36,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:36,942 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:36,943 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-04-17 18:43:36,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:36,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942654257] [2020-04-17 18:43:36,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:37,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942654257] [2020-04-17 18:43:37,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321125008] [2020-04-17 18:43:37,016 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:37,056 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:37,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:37,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:37,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:37,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:37,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:37,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118275745] [2020-04-17 18:43:37,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:37,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:37,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:37,152 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-04-17 18:43:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:37,379 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 18:43:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:43:37,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:37,380 INFO L225 Difference]: With dead ends: 201 [2020-04-17 18:43:37,380 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 18:43:37,381 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:43:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 18:43:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-04-17 18:43:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:43:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-04-17 18:43:37,384 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-04-17 18:43:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:37,385 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-04-17 18:43:37,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-04-17 18:43:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:37,385 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:37,385 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:37,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:37,589 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:37,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-04-17 18:43:37,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:37,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36651562] [2020-04-17 18:43:37,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:37,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36651562] [2020-04-17 18:43:37,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843359068] [2020-04-17 18:43:37,653 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:37,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:37,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:37,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:37,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:37,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476020755] [2020-04-17 18:43:37,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:37,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:37,799 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-04-17 18:43:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:38,009 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 18:43:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:38,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:38,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:38,010 INFO L225 Difference]: With dead ends: 194 [2020-04-17 18:43:38,010 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 18:43:38,011 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:43:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 18:43:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-04-17 18:43:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-04-17 18:43:38,014 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-04-17 18:43:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:38,014 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-04-17 18:43:38,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-04-17 18:43:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:38,014 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:38,014 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:38,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:38,215 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:38,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-04-17 18:43:38,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:38,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418144129] [2020-04-17 18:43:38,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:38,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418144129] [2020-04-17 18:43:38,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459881221] [2020-04-17 18:43:38,284 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:38,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:38,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:38,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:38,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:39,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:39,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:39,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292936589] [2020-04-17 18:43:39,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:39,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:39,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:39,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:39,116 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-04-17 18:43:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:39,406 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-04-17 18:43:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:39,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:39,407 INFO L225 Difference]: With dead ends: 209 [2020-04-17 18:43:39,407 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 18:43:39,408 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:43:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 18:43:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-04-17 18:43:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 18:43:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-04-17 18:43:39,411 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-04-17 18:43:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:39,411 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-04-17 18:43:39,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-04-17 18:43:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:39,412 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:39,412 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:39,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:39,613 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-04-17 18:43:39,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:39,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226898792] [2020-04-17 18:43:39,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:39,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226898792] [2020-04-17 18:43:39,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083403319] [2020-04-17 18:43:39,682 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:39,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:39,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:39,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:39,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:39,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:39,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:39,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534587414] [2020-04-17 18:43:39,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:39,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:39,823 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-04-17 18:43:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:40,103 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-04-17 18:43:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:43:40,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:40,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:40,104 INFO L225 Difference]: With dead ends: 202 [2020-04-17 18:43:40,104 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 18:43:40,104 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:40,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 18:43:40,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-04-17 18:43:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:43:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 18:43:40,106 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 18:43:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:40,106 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 18:43:40,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 18:43:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:40,107 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:40,107 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:40,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:40,308 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:40,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-04-17 18:43:40,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:40,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122808349] [2020-04-17 18:43:40,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:40,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122808349] [2020-04-17 18:43:40,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284747489] [2020-04-17 18:43:40,382 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:40,429 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:40,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:40,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:40,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:40,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:40,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:40,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612299662] [2020-04-17 18:43:40,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:40,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:40,526 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-04-17 18:43:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:40,804 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 18:43:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:40,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:40,805 INFO L225 Difference]: With dead ends: 201 [2020-04-17 18:43:40,805 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 18:43:40,806 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 18:43:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-04-17 18:43:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 18:43:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-04-17 18:43:40,809 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-04-17 18:43:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:40,809 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-04-17 18:43:40,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-04-17 18:43:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:40,810 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:40,810 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:41,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:41,014 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:41,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-04-17 18:43:41,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:41,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586876743] [2020-04-17 18:43:41,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:41,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586876743] [2020-04-17 18:43:41,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419241153] [2020-04-17 18:43:41,078 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:41,122 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:41,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:41,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:41,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:41,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:41,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:41,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611001565] [2020-04-17 18:43:41,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:41,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:41,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:41,633 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-04-17 18:43:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:42,012 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-04-17 18:43:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:43:42,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:42,014 INFO L225 Difference]: With dead ends: 215 [2020-04-17 18:43:42,014 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 18:43:42,014 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:43:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 18:43:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-04-17 18:43:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 18:43:42,018 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 18:43:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:42,019 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 18:43:42,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 18:43:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:42,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:42,019 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:42,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:42,222 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:42,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:42,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-04-17 18:43:42,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:42,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498627759] [2020-04-17 18:43:42,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:42,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498627759] [2020-04-17 18:43:42,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043431453] [2020-04-17 18:43:42,315 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:42,373 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:43:42,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:42,374 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:42,375 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:42,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:42,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:42,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200047608] [2020-04-17 18:43:42,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:42,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:42,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:42,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:42,485 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 18:43:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:42,796 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-04-17 18:43:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:43:42,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:42,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:42,798 INFO L225 Difference]: With dead ends: 196 [2020-04-17 18:43:42,798 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 18:43:42,799 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:43:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 18:43:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-04-17 18:43:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:42,803 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:42,803 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:42,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:42,803 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:42,803 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:42,804 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:43,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:43,006 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-04-17 18:43:43,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:43,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460438606] [2020-04-17 18:43:43,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:43,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460438606] [2020-04-17 18:43:43,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396033093] [2020-04-17 18:43:43,072 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:43,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:43,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:43,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:43,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:43,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:43,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767537744] [2020-04-17 18:43:43,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:43,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:43,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:43,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:43,188 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:43,455 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-04-17 18:43:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:43:43,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:43,456 INFO L225 Difference]: With dead ends: 191 [2020-04-17 18:43:43,456 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 18:43:43,457 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:43:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 18:43:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-04-17 18:43:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:43,460 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:43,460 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:43,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:43,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:43,461 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:43,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:43,661 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-04-17 18:43:43,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:43,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20113702] [2020-04-17 18:43:43,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:43,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20113702] [2020-04-17 18:43:43,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101271230] [2020-04-17 18:43:43,734 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:43,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:43:43,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:43,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:43,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:43,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:43,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:43,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:43,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882419184] [2020-04-17 18:43:43,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:43,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:43,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:43,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:43,870 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:44,361 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-04-17 18:43:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:43:44,361 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:44,362 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:43:44,363 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:43:44,363 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:43:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:43:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-04-17 18:43:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 18:43:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 18:43:44,366 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 18:43:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:44,367 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 18:43:44,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 18:43:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:44,367 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:44,367 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:44,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:44,568 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:44,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-04-17 18:43:44,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:44,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176815643] [2020-04-17 18:43:44,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:44,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176815643] [2020-04-17 18:43:44,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619373756] [2020-04-17 18:43:44,633 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:44,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:43:44,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:44,676 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:43:44,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:44,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:44,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:44,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55967577] [2020-04-17 18:43:44,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:44,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:44,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:44,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:43:44,788 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 18:43:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:45,393 INFO L93 Difference]: Finished difference Result 243 states and 560 transitions. [2020-04-17 18:43:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 18:43:45,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:45,401 INFO L225 Difference]: With dead ends: 243 [2020-04-17 18:43:45,401 INFO L226 Difference]: Without dead ends: 239 [2020-04-17 18:43:45,401 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:43:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-04-17 18:43:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 144. [2020-04-17 18:43:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 18:43:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 18:43:45,403 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 18:43:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:45,403 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 18:43:45,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 18:43:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:45,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:45,404 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:45,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:45,605 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:45,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-04-17 18:43:45,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:45,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452826238] [2020-04-17 18:43:45,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:45,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452826238] [2020-04-17 18:43:45,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112577389] [2020-04-17 18:43:45,704 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:45,762 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:43:45,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:45,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:45,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:46,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:46,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:43:46,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746060282] [2020-04-17 18:43:46,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:43:46,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:43:46,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=144, Unknown=2, NotChecked=0, Total=210 [2020-04-17 18:43:46,784 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 18:43:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:49,584 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-04-17 18:43:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:43:49,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:43:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:49,586 INFO L225 Difference]: With dead ends: 254 [2020-04-17 18:43:49,586 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 18:43:49,587 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=342, Invalid=776, Unknown=4, NotChecked=0, Total=1122 [2020-04-17 18:43:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 18:43:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-04-17 18:43:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 18:43:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-04-17 18:43:49,590 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-04-17 18:43:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:49,591 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-04-17 18:43:49,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:43:49,591 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-04-17 18:43:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:43:49,591 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:49,591 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:49,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:49,795 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:49,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-04-17 18:43:49,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:49,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355405627] [2020-04-17 18:43:49,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:49,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355405627] [2020-04-17 18:43:49,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829515882] [2020-04-17 18:43:49,864 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:49,901 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:43:49,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:43:49,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:43:49,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:49,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:43:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:50,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:50,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 18:43:50,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915551326] [2020-04-17 18:43:50,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:50,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:50,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 18:43:50,469 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 16 states. [2020-04-17 18:43:51,556 WARN L192 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 18:44:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:00,500 INFO L93 Difference]: Finished difference Result 251 states and 590 transitions. [2020-04-17 18:44:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 18:44:00,500 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 18:44:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:00,501 INFO L225 Difference]: With dead ends: 251 [2020-04-17 18:44:00,501 INFO L226 Difference]: Without dead ends: 243 [2020-04-17 18:44:00,502 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=434, Invalid=1043, Unknown=5, NotChecked=0, Total=1482 [2020-04-17 18:44:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-04-17 18:44:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 139. [2020-04-17 18:44:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 18:44:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-04-17 18:44:00,506 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-04-17 18:44:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:00,507 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-04-17 18:44:00,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:44:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-04-17 18:44:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:00,507 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:00,507 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:00,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:00,711 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:00,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:00,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-04-17 18:44:00,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:00,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874214116] [2020-04-17 18:44:00,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:00,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874214116] [2020-04-17 18:44:00,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668323428] [2020-04-17 18:44:00,777 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:00,821 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:44:00,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:00,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:00,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:00,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:00,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:00,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097656097] [2020-04-17 18:44:00,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:00,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:00,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:00,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:00,938 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-04-17 18:44:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:01,272 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-04-17 18:44:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:44:01,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:01,272 INFO L225 Difference]: With dead ends: 208 [2020-04-17 18:44:01,273 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 18:44:01,273 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:44:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 18:44:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-04-17 18:44:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 18:44:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-04-17 18:44:01,276 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-04-17 18:44:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:01,276 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-04-17 18:44:01,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-04-17 18:44:01,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:01,276 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:01,276 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:01,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:01,477 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-04-17 18:44:01,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:01,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15643933] [2020-04-17 18:44:01,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:01,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15643933] [2020-04-17 18:44:01,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918096810] [2020-04-17 18:44:01,544 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:01,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:01,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:01,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:01,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:01,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437936029] [2020-04-17 18:44:01,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:01,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:01,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:01,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:01,670 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-04-17 18:44:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:02,099 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-04-17 18:44:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:44:02,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:02,100 INFO L225 Difference]: With dead ends: 215 [2020-04-17 18:44:02,100 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 18:44:02,101 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-04-17 18:44:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 18:44:02,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-04-17 18:44:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:44:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 18:44:02,104 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 18:44:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:02,105 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 18:44:02,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 18:44:02,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:02,105 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:02,105 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:02,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:02,306 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-04-17 18:44:02,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:02,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613694617] [2020-04-17 18:44:02,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:02,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613694617] [2020-04-17 18:44:02,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966432936] [2020-04-17 18:44:02,368 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:02,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:02,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:02,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:02,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:02,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:44:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:02,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:02,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:02,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087014727] [2020-04-17 18:44:02,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:02,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:02,518 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 18:44:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:02,997 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-04-17 18:44:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:44:02,997 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:02,998 INFO L225 Difference]: With dead ends: 236 [2020-04-17 18:44:02,998 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 18:44:02,998 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:44:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 18:44:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-04-17 18:44:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 18:44:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 18:44:03,001 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 18:44:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:03,001 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 18:44:03,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 18:44:03,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:03,001 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:03,001 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:03,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:03,202 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-04-17 18:44:03,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:03,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754413014] [2020-04-17 18:44:03,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:03,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754413014] [2020-04-17 18:44:03,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119617425] [2020-04-17 18:44:03,266 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:03,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:44:03,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:03,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:03,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:03,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:44:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:03,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:03,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:03,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028998651] [2020-04-17 18:44:03,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:03,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:03,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:03,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:03,388 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 18:44:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:03,908 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-04-17 18:44:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 18:44:03,908 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:03,909 INFO L225 Difference]: With dead ends: 241 [2020-04-17 18:44:03,909 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 18:44:03,909 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:44:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 18:44:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-04-17 18:44:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-04-17 18:44:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-04-17 18:44:03,912 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-04-17 18:44:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:03,912 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-04-17 18:44:03,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-04-17 18:44:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:03,912 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:03,912 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:04,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:04,114 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-04-17 18:44:04,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:04,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963380979] [2020-04-17 18:44:04,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:04,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963380979] [2020-04-17 18:44:04,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998586064] [2020-04-17 18:44:04,179 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:04,222 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:04,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:04,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:04,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:04,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:44:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:04,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:04,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 18:44:04,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015815048] [2020-04-17 18:44:04,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:04,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:04,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:04,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:04,306 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-04-17 18:44:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:04,822 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-04-17 18:44:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 18:44:04,823 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:04,825 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:44:04,825 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 18:44:04,826 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 18:44:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 18:44:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-04-17 18:44:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 18:44:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-04-17 18:44:04,830 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-04-17 18:44:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:04,830 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-04-17 18:44:04,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-04-17 18:44:04,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:04,831 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:04,831 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:05,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:05,034 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-04-17 18:44:05,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:05,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009691679] [2020-04-17 18:44:05,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 18:44:05,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009691679] [2020-04-17 18:44:05,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177492394] [2020-04-17 18:44:05,093 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:05,141 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:44:05,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:05,142 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:05,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:05,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:44:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:05,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:05,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 13 [2020-04-17 18:44:05,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642491833] [2020-04-17 18:44:05,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:44:05,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:05,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:44:05,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:44:05,298 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 15 states. [2020-04-17 18:44:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:05,764 INFO L93 Difference]: Finished difference Result 155 states and 365 transitions. [2020-04-17 18:44:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:05,764 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 18:44:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:05,765 INFO L225 Difference]: With dead ends: 155 [2020-04-17 18:44:05,765 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 18:44:05,766 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:44:05,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 18:44:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 117. [2020-04-17 18:44:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 18:44:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-04-17 18:44:05,769 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 13 [2020-04-17 18:44:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:05,770 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-04-17 18:44:05,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:44:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-04-17 18:44:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:44:05,771 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:05,771 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:05,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:05,975 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:05,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-04-17 18:44:05,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:05,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50388544] [2020-04-17 18:44:05,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 18:44:06,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50388544] [2020-04-17 18:44:06,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474852725] [2020-04-17 18:44:06,092 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:06,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:44:06,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:06,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:44:06,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:06,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 18:44:06,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-17 18:44:06,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136542368] [2020-04-17 18:44:06,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:44:06,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:06,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:44:06,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:44:06,274 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 8 states. [2020-04-17 18:44:06,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:06,304 INFO L93 Difference]: Finished difference Result 190 states and 483 transitions. [2020-04-17 18:44:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:44:06,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-04-17 18:44:06,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:06,306 INFO L225 Difference]: With dead ends: 190 [2020-04-17 18:44:06,306 INFO L226 Difference]: Without dead ends: 178 [2020-04-17 18:44:06,306 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:44:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-04-17 18:44:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-04-17 18:44:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-04-17 18:44:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 454 transitions. [2020-04-17 18:44:06,311 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 454 transitions. Word has length 13 [2020-04-17 18:44:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:06,312 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 454 transitions. [2020-04-17 18:44:06,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:44:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 454 transitions. [2020-04-17 18:44:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:06,313 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:06,313 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:06,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:06,517 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-04-17 18:44:06,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:06,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170247993] [2020-04-17 18:44:06,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:06,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170247993] [2020-04-17 18:44:06,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045897577] [2020-04-17 18:44:06,623 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:06,665 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:06,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:06,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:06,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:06,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:06,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:06,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882528633] [2020-04-17 18:44:06,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:06,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:06,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:06,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:06,799 INFO L87 Difference]: Start difference. First operand 178 states and 454 transitions. Second operand 17 states. [2020-04-17 18:44:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:06,877 INFO L93 Difference]: Finished difference Result 216 states and 530 transitions. [2020-04-17 18:44:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:44:06,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:06,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:06,879 INFO L225 Difference]: With dead ends: 216 [2020-04-17 18:44:06,879 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 18:44:06,879 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 18:44:06,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-04-17 18:44:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-04-17 18:44:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 478 transitions. [2020-04-17 18:44:06,883 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 478 transitions. Word has length 14 [2020-04-17 18:44:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:06,883 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 478 transitions. [2020-04-17 18:44:06,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 478 transitions. [2020-04-17 18:44:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:06,884 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:06,884 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:07,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:07,085 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:07,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-04-17 18:44:07,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:07,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629925889] [2020-04-17 18:44:07,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:07,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629925889] [2020-04-17 18:44:07,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013107745] [2020-04-17 18:44:07,212 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:07,279 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:44:07,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:07,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:07,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:07,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:07,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:07,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474306033] [2020-04-17 18:44:07,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:07,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:07,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:07,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:07,446 INFO L87 Difference]: Start difference. First operand 186 states and 478 transitions. Second operand 17 states. [2020-04-17 18:44:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:07,630 INFO L93 Difference]: Finished difference Result 232 states and 562 transitions. [2020-04-17 18:44:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:44:07,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:07,632 INFO L225 Difference]: With dead ends: 232 [2020-04-17 18:44:07,632 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 18:44:07,632 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:44:07,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 18:44:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 184. [2020-04-17 18:44:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:44:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 18:44:07,635 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 18:44:07,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:07,636 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 18:44:07,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:07,636 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 18:44:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:07,636 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:07,636 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:07,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:07,837 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:07,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:07,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-04-17 18:44:07,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:07,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660426729] [2020-04-17 18:44:07,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:07,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660426729] [2020-04-17 18:44:07,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811456607] [2020-04-17 18:44:07,928 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:07,971 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:07,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:14,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:14,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:14,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503984765] [2020-04-17 18:44:14,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:14,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:14,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:14,464 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 17 states. [2020-04-17 18:44:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:14,976 INFO L93 Difference]: Finished difference Result 250 states and 600 transitions. [2020-04-17 18:44:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:44:14,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:14,978 INFO L225 Difference]: With dead ends: 250 [2020-04-17 18:44:14,978 INFO L226 Difference]: Without dead ends: 248 [2020-04-17 18:44:14,978 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:44:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-04-17 18:44:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 182. [2020-04-17 18:44:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-04-17 18:44:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 466 transitions. [2020-04-17 18:44:14,982 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 466 transitions. Word has length 14 [2020-04-17 18:44:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:14,982 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 466 transitions. [2020-04-17 18:44:14,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 466 transitions. [2020-04-17 18:44:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:14,982 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:14,983 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:15,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:15,183 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-04-17 18:44:15,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:15,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115859533] [2020-04-17 18:44:15,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:15,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115859533] [2020-04-17 18:44:15,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792401356] [2020-04-17 18:44:15,277 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:15,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:15,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:15,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:15,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:17,516 WARN L192 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-17 18:44:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:17,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:17,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:44:17,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811857493] [2020-04-17 18:44:17,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:44:17,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:17,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:44:17,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=205, Unknown=2, NotChecked=0, Total=306 [2020-04-17 18:44:17,519 INFO L87 Difference]: Start difference. First operand 182 states and 466 transitions. Second operand 18 states. [2020-04-17 18:44:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:21,305 INFO L93 Difference]: Finished difference Result 254 states and 606 transitions. [2020-04-17 18:44:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:21,306 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:44:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:21,306 INFO L225 Difference]: With dead ends: 254 [2020-04-17 18:44:21,307 INFO L226 Difference]: Without dead ends: 252 [2020-04-17 18:44:21,307 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=209, Invalid=389, Unknown=2, NotChecked=0, Total=600 [2020-04-17 18:44:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-04-17 18:44:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 184. [2020-04-17 18:44:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:44:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 18:44:21,310 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 18:44:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:21,311 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 18:44:21,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:44:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 18:44:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:21,311 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:21,311 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:21,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:21,515 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-04-17 18:44:21,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:21,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261996436] [2020-04-17 18:44:21,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:21,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261996436] [2020-04-17 18:44:21,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857944326] [2020-04-17 18:44:21,609 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:21,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:44:21,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:21,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:21,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:21,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:21,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:21,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915336050] [2020-04-17 18:44:21,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:21,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:21,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:21,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:21,816 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 17 states. [2020-04-17 18:44:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:22,095 INFO L93 Difference]: Finished difference Result 264 states and 626 transitions. [2020-04-17 18:44:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:22,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:22,097 INFO L225 Difference]: With dead ends: 264 [2020-04-17 18:44:22,097 INFO L226 Difference]: Without dead ends: 262 [2020-04-17 18:44:22,098 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-04-17 18:44:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 184. [2020-04-17 18:44:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:44:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 18:44:22,102 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 18:44:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:22,102 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 18:44:22,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 18:44:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:22,103 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:22,103 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:22,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:22,307 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-04-17 18:44:22,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:22,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611400577] [2020-04-17 18:44:22,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:22,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611400577] [2020-04-17 18:44:22,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918438742] [2020-04-17 18:44:22,396 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 18:44:22,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:22,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:22,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:22,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:32,895 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 18:44:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:32,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:32,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:44:32,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089818295] [2020-04-17 18:44:32,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:44:32,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:44:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=206, Unknown=4, NotChecked=0, Total=306 [2020-04-17 18:44:32,897 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 18 states. [2020-04-17 18:44:35,294 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 18:44:39,515 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 29 [2020-04-17 18:44:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:47,575 INFO L93 Difference]: Finished difference Result 262 states and 622 transitions. [2020-04-17 18:44:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:44:47,576 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:44:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:47,577 INFO L225 Difference]: With dead ends: 262 [2020-04-17 18:44:47,577 INFO L226 Difference]: Without dead ends: 260 [2020-04-17 18:44:47,577 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=209, Invalid=387, Unknown=4, NotChecked=0, Total=600 [2020-04-17 18:44:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-04-17 18:44:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 180. [2020-04-17 18:44:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-04-17 18:44:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 460 transitions. [2020-04-17 18:44:47,581 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 460 transitions. Word has length 14 [2020-04-17 18:44:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:47,581 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 460 transitions. [2020-04-17 18:44:47,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:44:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 460 transitions. [2020-04-17 18:44:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:47,581 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:47,581 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:47,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:47,782 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-04-17 18:44:47,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:47,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359742307] [2020-04-17 18:44:47,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:47,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359742307] [2020-04-17 18:44:47,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426046930] [2020-04-17 18:44:47,869 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:47,908 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:47,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:47,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:47,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:48,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:48,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:48,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071223673] [2020-04-17 18:44:48,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:48,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:48,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:48,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:48,087 INFO L87 Difference]: Start difference. First operand 180 states and 460 transitions. Second operand 17 states. [2020-04-17 18:44:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:48,368 INFO L93 Difference]: Finished difference Result 252 states and 602 transitions. [2020-04-17 18:44:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:44:48,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:48,369 INFO L225 Difference]: With dead ends: 252 [2020-04-17 18:44:48,369 INFO L226 Difference]: Without dead ends: 250 [2020-04-17 18:44:48,369 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-04-17 18:44:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 183. [2020-04-17 18:44:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-04-17 18:44:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2020-04-17 18:44:48,373 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 14 [2020-04-17 18:44:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:48,373 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2020-04-17 18:44:48,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2020-04-17 18:44:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:48,374 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:48,374 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:48,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:48,575 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:48,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-04-17 18:44:48,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:48,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088495546] [2020-04-17 18:44:48,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:48,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088495546] [2020-04-17 18:44:48,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351513684] [2020-04-17 18:44:48,665 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:48,705 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:44:48,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:48,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:48,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:49,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:49,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:49,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758786650] [2020-04-17 18:44:49,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:49,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:49,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:49,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:49,216 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand 17 states. [2020-04-17 18:44:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:49,526 INFO L93 Difference]: Finished difference Result 268 states and 634 transitions. [2020-04-17 18:44:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:49,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:49,527 INFO L225 Difference]: With dead ends: 268 [2020-04-17 18:44:49,527 INFO L226 Difference]: Without dead ends: 266 [2020-04-17 18:44:49,528 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:44:49,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-04-17 18:44:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 184. [2020-04-17 18:44:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:44:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-04-17 18:44:49,532 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 14 [2020-04-17 18:44:49,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:49,532 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-04-17 18:44:49,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-04-17 18:44:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:49,532 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:49,532 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:49,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:49,733 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:49,734 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-04-17 18:44:49,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:49,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688751426] [2020-04-17 18:44:49,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:49,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688751426] [2020-04-17 18:44:49,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206846971] [2020-04-17 18:44:49,824 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:49,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:49,866 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:49,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:49,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:49,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911689941] [2020-04-17 18:44:49,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:49,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:49,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:49,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:49,992 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 17 states. [2020-04-17 18:44:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:50,258 INFO L93 Difference]: Finished difference Result 267 states and 635 transitions. [2020-04-17 18:44:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:44:50,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:50,259 INFO L225 Difference]: With dead ends: 267 [2020-04-17 18:44:50,259 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 18:44:50,259 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:44:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 18:44:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 183. [2020-04-17 18:44:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-04-17 18:44:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2020-04-17 18:44:50,263 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 14 [2020-04-17 18:44:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:50,263 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2020-04-17 18:44:50,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2020-04-17 18:44:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:50,264 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:50,264 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:50,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:50,465 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:50,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-04-17 18:44:50,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:50,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2469978] [2020-04-17 18:44:50,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:50,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2469978] [2020-04-17 18:44:50,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554509914] [2020-04-17 18:44:50,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:50,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:44:50,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:50,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:50,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:50,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:50,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:50,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789799537] [2020-04-17 18:44:50,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:50,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:50,737 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand 17 states. [2020-04-17 18:44:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:50,965 INFO L93 Difference]: Finished difference Result 246 states and 586 transitions. [2020-04-17 18:44:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:50,966 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:50,967 INFO L225 Difference]: With dead ends: 246 [2020-04-17 18:44:50,967 INFO L226 Difference]: Without dead ends: 236 [2020-04-17 18:44:50,967 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-04-17 18:44:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 180. [2020-04-17 18:44:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-04-17 18:44:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 458 transitions. [2020-04-17 18:44:50,971 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 458 transitions. Word has length 14 [2020-04-17 18:44:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:50,972 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 458 transitions. [2020-04-17 18:44:50,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 458 transitions. [2020-04-17 18:44:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:50,972 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:50,972 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:51,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:51,175 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:51,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-04-17 18:44:51,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:51,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650172257] [2020-04-17 18:44:51,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:51,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650172257] [2020-04-17 18:44:51,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277396885] [2020-04-17 18:44:51,277 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:51,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:44:51,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:51,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:51,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:51,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:51,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:51,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978504472] [2020-04-17 18:44:51,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:51,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:51,450 INFO L87 Difference]: Start difference. First operand 180 states and 458 transitions. Second operand 17 states. [2020-04-17 18:44:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:51,675 INFO L93 Difference]: Finished difference Result 244 states and 586 transitions. [2020-04-17 18:44:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:44:51,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:51,676 INFO L225 Difference]: With dead ends: 244 [2020-04-17 18:44:51,676 INFO L226 Difference]: Without dead ends: 242 [2020-04-17 18:44:51,676 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-04-17 18:44:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2020-04-17 18:44:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-04-17 18:44:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 471 transitions. [2020-04-17 18:44:51,680 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 471 transitions. Word has length 14 [2020-04-17 18:44:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:51,680 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 471 transitions. [2020-04-17 18:44:51,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 471 transitions. [2020-04-17 18:44:51,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:51,681 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:51,681 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:51,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:51,881 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-04-17 18:44:51,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:51,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411995573] [2020-04-17 18:44:51,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:51,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411995573] [2020-04-17 18:44:51,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186372738] [2020-04-17 18:44:51,979 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:52,018 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:44:52,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:52,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:52,019 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:52,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:52,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:44:52,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293352844] [2020-04-17 18:44:52,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:44:52,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:52,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:44:52,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:44:52,888 INFO L87 Difference]: Start difference. First operand 185 states and 471 transitions. Second operand 17 states. [2020-04-17 18:44:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:53,127 INFO L93 Difference]: Finished difference Result 257 states and 610 transitions. [2020-04-17 18:44:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:44:53,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:44:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:53,128 INFO L225 Difference]: With dead ends: 257 [2020-04-17 18:44:53,128 INFO L226 Difference]: Without dead ends: 255 [2020-04-17 18:44:53,128 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:44:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-04-17 18:44:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 184. [2020-04-17 18:44:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-04-17 18:44:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 468 transitions. [2020-04-17 18:44:53,133 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 468 transitions. Word has length 14 [2020-04-17 18:44:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:53,133 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 468 transitions. [2020-04-17 18:44:53,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:44:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 468 transitions. [2020-04-17 18:44:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:44:53,133 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:53,133 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:53,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:53,334 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-04-17 18:44:53,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:53,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141219353] [2020-04-17 18:44:53,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:53,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141219353] [2020-04-17 18:44:53,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672864317] [2020-04-17 18:44:53,434 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:53,482 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:44:53,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:44:53,483 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:44:53,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:05,963 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 18:45:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:05,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:05,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:45:05,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124022096] [2020-04-17 18:45:05,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:45:05,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:05,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:45:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=209, Unknown=5, NotChecked=0, Total=306 [2020-04-17 18:45:05,965 INFO L87 Difference]: Start difference. First operand 184 states and 468 transitions. Second operand 18 states. [2020-04-17 18:45:08,435 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 28 [2020-04-17 18:45:10,759 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 18:45:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:24,891 INFO L93 Difference]: Finished difference Result 287 states and 672 transitions. [2020-04-17 18:45:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:45:24,891 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:45:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:24,892 INFO L225 Difference]: With dead ends: 287 [2020-04-17 18:45:24,892 INFO L226 Difference]: Without dead ends: 283 [2020-04-17 18:45:24,893 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=216, Invalid=429, Unknown=5, NotChecked=0, Total=650 [2020-04-17 18:45:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-04-17 18:45:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 189. [2020-04-17 18:45:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-04-17 18:45:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 481 transitions. [2020-04-17 18:45:24,896 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 481 transitions. Word has length 14 [2020-04-17 18:45:24,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:24,896 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 481 transitions. [2020-04-17 18:45:24,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:45:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 481 transitions. [2020-04-17 18:45:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:24,897 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:24,897 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:25,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:25,097 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:25,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:25,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-04-17 18:45:25,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:25,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682469261] [2020-04-17 18:45:25,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:25,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682469261] [2020-04-17 18:45:25,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134098511] [2020-04-17 18:45:25,236 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:25,295 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:25,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:25,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:25,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:25,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:25,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:25,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216213096] [2020-04-17 18:45:25,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:25,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:25,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:25,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:25,449 INFO L87 Difference]: Start difference. First operand 189 states and 481 transitions. Second operand 17 states. [2020-04-17 18:45:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:25,702 INFO L93 Difference]: Finished difference Result 276 states and 647 transitions. [2020-04-17 18:45:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:45:25,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:25,704 INFO L225 Difference]: With dead ends: 276 [2020-04-17 18:45:25,704 INFO L226 Difference]: Without dead ends: 266 [2020-04-17 18:45:25,704 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:45:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-04-17 18:45:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 189. [2020-04-17 18:45:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-04-17 18:45:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 477 transitions. [2020-04-17 18:45:25,708 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 477 transitions. Word has length 14 [2020-04-17 18:45:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:25,708 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 477 transitions. [2020-04-17 18:45:25,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 477 transitions. [2020-04-17 18:45:25,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:25,709 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:25,709 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:25,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:25,910 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:25,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-04-17 18:45:25,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:25,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878255800] [2020-04-17 18:45:25,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:26,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878255800] [2020-04-17 18:45:26,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345800317] [2020-04-17 18:45:26,012 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:26,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:26,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:26,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:26,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:26,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736002142] [2020-04-17 18:45:26,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:26,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:26,206 INFO L87 Difference]: Start difference. First operand 189 states and 477 transitions. Second operand 17 states. [2020-04-17 18:45:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:26,455 INFO L93 Difference]: Finished difference Result 252 states and 602 transitions. [2020-04-17 18:45:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:45:26,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:26,457 INFO L225 Difference]: With dead ends: 252 [2020-04-17 18:45:26,457 INFO L226 Difference]: Without dead ends: 250 [2020-04-17 18:45:26,457 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:45:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-04-17 18:45:26,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 186. [2020-04-17 18:45:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-04-17 18:45:26,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 470 transitions. [2020-04-17 18:45:26,461 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 470 transitions. Word has length 14 [2020-04-17 18:45:26,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:26,461 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 470 transitions. [2020-04-17 18:45:26,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:26,462 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 470 transitions. [2020-04-17 18:45:26,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:26,462 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:26,462 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:26,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:26,663 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:26,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:26,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-04-17 18:45:26,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:26,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680479158] [2020-04-17 18:45:26,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:26,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680479158] [2020-04-17 18:45:26,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212725901] [2020-04-17 18:45:26,833 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:26,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:45:26,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:26,903 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:26,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:27,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:27,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:27,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36118593] [2020-04-17 18:45:27,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:27,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:27,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:27,148 INFO L87 Difference]: Start difference. First operand 186 states and 470 transitions. Second operand 17 states. [2020-04-17 18:45:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:27,312 INFO L93 Difference]: Finished difference Result 241 states and 575 transitions. [2020-04-17 18:45:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:45:27,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:27,313 INFO L225 Difference]: With dead ends: 241 [2020-04-17 18:45:27,314 INFO L226 Difference]: Without dead ends: 236 [2020-04-17 18:45:27,314 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:45:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-04-17 18:45:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 188. [2020-04-17 18:45:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 18:45:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2020-04-17 18:45:27,318 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 14 [2020-04-17 18:45:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:27,318 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2020-04-17 18:45:27,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2020-04-17 18:45:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:27,319 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:27,319 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:27,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:27,520 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:27,520 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-04-17 18:45:27,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:27,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041568763] [2020-04-17 18:45:27,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:27,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041568763] [2020-04-17 18:45:27,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989492173] [2020-04-17 18:45:27,645 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:27,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:45:27,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:27,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:27,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:27,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:27,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:27,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986497302] [2020-04-17 18:45:27,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:27,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:27,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:27,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:27,816 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand 17 states. [2020-04-17 18:45:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:27,885 INFO L93 Difference]: Finished difference Result 237 states and 570 transitions. [2020-04-17 18:45:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:45:27,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:27,886 INFO L225 Difference]: With dead ends: 237 [2020-04-17 18:45:27,887 INFO L226 Difference]: Without dead ends: 235 [2020-04-17 18:45:27,887 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:45:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-04-17 18:45:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 196. [2020-04-17 18:45:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-04-17 18:45:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 496 transitions. [2020-04-17 18:45:27,891 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 496 transitions. Word has length 14 [2020-04-17 18:45:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:27,891 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 496 transitions. [2020-04-17 18:45:27,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 496 transitions. [2020-04-17 18:45:27,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:27,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:27,892 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:28,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:28,092 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-04-17 18:45:28,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:28,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230811653] [2020-04-17 18:45:28,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:28,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230811653] [2020-04-17 18:45:28,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804499546] [2020-04-17 18:45:28,207 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:28,252 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:45:28,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:28,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:28,254 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:28,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:28,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:28,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788318049] [2020-04-17 18:45:28,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:28,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:28,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:28,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:28,382 INFO L87 Difference]: Start difference. First operand 196 states and 496 transitions. Second operand 17 states. [2020-04-17 18:45:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:28,580 INFO L93 Difference]: Finished difference Result 249 states and 594 transitions. [2020-04-17 18:45:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:45:28,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:28,581 INFO L225 Difference]: With dead ends: 249 [2020-04-17 18:45:28,581 INFO L226 Difference]: Without dead ends: 247 [2020-04-17 18:45:28,582 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:45:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-04-17 18:45:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 194. [2020-04-17 18:45:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:45:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 18:45:28,585 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 18:45:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:28,585 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 18:45:28,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 18:45:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:28,586 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:28,586 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:28,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:28,787 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:28,787 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-04-17 18:45:28,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:28,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68107149] [2020-04-17 18:45:28,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:28,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68107149] [2020-04-17 18:45:28,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469220204] [2020-04-17 18:45:28,888 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:28,931 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:45:28,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:28,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:28,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:29,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:29,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:29,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500649893] [2020-04-17 18:45:29,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:29,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:29,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:29,082 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 18:45:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:29,395 INFO L93 Difference]: Finished difference Result 265 states and 628 transitions. [2020-04-17 18:45:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:45:29,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:29,396 INFO L225 Difference]: With dead ends: 265 [2020-04-17 18:45:29,396 INFO L226 Difference]: Without dead ends: 263 [2020-04-17 18:45:29,397 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:45:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-17 18:45:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 192. [2020-04-17 18:45:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:45:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 484 transitions. [2020-04-17 18:45:29,400 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 484 transitions. Word has length 14 [2020-04-17 18:45:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:29,400 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 484 transitions. [2020-04-17 18:45:29,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 484 transitions. [2020-04-17 18:45:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:29,401 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:29,401 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:29,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:29,602 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-04-17 18:45:29,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:29,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858538379] [2020-04-17 18:45:29,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:29,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858538379] [2020-04-17 18:45:29,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170916751] [2020-04-17 18:45:29,694 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:29,737 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:45:29,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:45:29,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:29,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:30,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:30,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:45:30,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74784057] [2020-04-17 18:45:30,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:45:30,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:30,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:45:30,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:45:30,948 INFO L87 Difference]: Start difference. First operand 192 states and 484 transitions. Second operand 17 states. [2020-04-17 18:45:31,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:31,324 INFO L93 Difference]: Finished difference Result 263 states and 622 transitions. [2020-04-17 18:45:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:45:31,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:45:31,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:31,325 INFO L225 Difference]: With dead ends: 263 [2020-04-17 18:45:31,325 INFO L226 Difference]: Without dead ends: 261 [2020-04-17 18:45:31,325 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:45:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-04-17 18:45:31,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 194. [2020-04-17 18:45:31,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:45:31,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 18:45:31,330 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 18:45:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:45:31,330 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 18:45:31,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:45:31,330 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 18:45:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:45:31,331 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:31,331 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:45:31,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:31,531 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:31,532 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-04-17 18:45:31,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:31,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216322678] [2020-04-17 18:45:31,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:31,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216322678] [2020-04-17 18:45:31,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317558461] [2020-04-17 18:45:31,623 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:45:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:31,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:45:31,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:45:40,002 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 18:45:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:40,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:45:40,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:45:40,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228322328] [2020-04-17 18:45:40,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:45:40,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:40,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:45:40,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=221, Unknown=3, NotChecked=0, Total=306 [2020-04-17 18:45:40,004 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 18 states. [2020-04-17 18:45:42,406 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 18:45:46,553 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-04-17 18:46:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:00,705 INFO L93 Difference]: Finished difference Result 297 states and 692 transitions. [2020-04-17 18:46:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:00,706 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:46:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:00,706 INFO L225 Difference]: With dead ends: 297 [2020-04-17 18:46:00,706 INFO L226 Difference]: Without dead ends: 295 [2020-04-17 18:46:00,707 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=246, Invalid=505, Unknown=5, NotChecked=0, Total=756 [2020-04-17 18:46:00,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-04-17 18:46:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 194. [2020-04-17 18:46:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:46:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 18:46:00,710 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 18:46:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:00,710 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 18:46:00,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:46:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 18:46:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:00,710 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:00,710 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:00,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:00,911 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-04-17 18:46:00,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:00,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656059486] [2020-04-17 18:46:00,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:01,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656059486] [2020-04-17 18:46:01,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250617864] [2020-04-17 18:46:01,010 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:01,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:01,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:01,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:01,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:01,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:01,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:01,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834531298] [2020-04-17 18:46:01,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:01,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:01,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:01,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:01,226 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 18:46:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:01,592 INFO L93 Difference]: Finished difference Result 270 states and 637 transitions. [2020-04-17 18:46:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:01,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:01,593 INFO L225 Difference]: With dead ends: 270 [2020-04-17 18:46:01,594 INFO L226 Difference]: Without dead ends: 268 [2020-04-17 18:46:01,594 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-17 18:46:01,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 190. [2020-04-17 18:46:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 18:46:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 478 transitions. [2020-04-17 18:46:01,599 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 478 transitions. Word has length 14 [2020-04-17 18:46:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:01,599 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 478 transitions. [2020-04-17 18:46:01,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 478 transitions. [2020-04-17 18:46:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:01,600 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:01,600 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:01,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:01,802 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:01,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:01,802 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-04-17 18:46:01,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:01,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396368758] [2020-04-17 18:46:01,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:01,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396368758] [2020-04-17 18:46:01,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666307941] [2020-04-17 18:46:01,884 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:01,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:01,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:01,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:01,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:02,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:02,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:02,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557937385] [2020-04-17 18:46:02,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:02,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:02,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:02,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:02,066 INFO L87 Difference]: Start difference. First operand 190 states and 478 transitions. Second operand 17 states. [2020-04-17 18:46:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:02,432 INFO L93 Difference]: Finished difference Result 261 states and 618 transitions. [2020-04-17 18:46:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:02,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:02,433 INFO L225 Difference]: With dead ends: 261 [2020-04-17 18:46:02,433 INFO L226 Difference]: Without dead ends: 259 [2020-04-17 18:46:02,434 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:46:02,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-04-17 18:46:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 193. [2020-04-17 18:46:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-04-17 18:46:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 487 transitions. [2020-04-17 18:46:02,439 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 487 transitions. Word has length 14 [2020-04-17 18:46:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:02,439 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 487 transitions. [2020-04-17 18:46:02,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 487 transitions. [2020-04-17 18:46:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:02,440 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:02,440 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:02,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:02,643 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:02,643 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-04-17 18:46:02,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:02,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272576880] [2020-04-17 18:46:02,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:02,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272576880] [2020-04-17 18:46:02,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297218796] [2020-04-17 18:46:02,734 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:02,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:02,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:02,780 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:02,781 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:03,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:03,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:03,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474341221] [2020-04-17 18:46:03,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:03,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:03,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:03,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:03,276 INFO L87 Difference]: Start difference. First operand 193 states and 487 transitions. Second operand 17 states. [2020-04-17 18:46:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:03,656 INFO L93 Difference]: Finished difference Result 286 states and 669 transitions. [2020-04-17 18:46:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:03,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:03,657 INFO L225 Difference]: With dead ends: 286 [2020-04-17 18:46:03,657 INFO L226 Difference]: Without dead ends: 284 [2020-04-17 18:46:03,658 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-04-17 18:46:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-04-17 18:46:03,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 194. [2020-04-17 18:46:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:46:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2020-04-17 18:46:03,662 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 14 [2020-04-17 18:46:03,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:03,662 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2020-04-17 18:46:03,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2020-04-17 18:46:03,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:03,662 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:03,662 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:03,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:03,863 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-04-17 18:46:03,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:03,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514199300] [2020-04-17 18:46:03,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:03,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514199300] [2020-04-17 18:46:03,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280862965] [2020-04-17 18:46:03,944 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:03,986 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:03,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:03,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:03,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:04,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:04,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:04,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616149012] [2020-04-17 18:46:04,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:04,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:04,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:04,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:04,116 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand 17 states. [2020-04-17 18:46:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:04,417 INFO L93 Difference]: Finished difference Result 288 states and 676 transitions. [2020-04-17 18:46:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:04,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:04,418 INFO L225 Difference]: With dead ends: 288 [2020-04-17 18:46:04,418 INFO L226 Difference]: Without dead ends: 286 [2020-04-17 18:46:04,418 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-04-17 18:46:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 193. [2020-04-17 18:46:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-04-17 18:46:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 487 transitions. [2020-04-17 18:46:04,423 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 487 transitions. Word has length 14 [2020-04-17 18:46:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:04,423 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 487 transitions. [2020-04-17 18:46:04,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 487 transitions. [2020-04-17 18:46:04,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:04,423 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:04,424 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:04,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:04,624 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:04,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:04,625 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-04-17 18:46:04,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:04,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341515456] [2020-04-17 18:46:04,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:04,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341515456] [2020-04-17 18:46:04,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751233916] [2020-04-17 18:46:04,749 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:04,814 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:04,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:04,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:04,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:05,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:05,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:05,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:05,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207405226] [2020-04-17 18:46:05,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:05,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:05,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:05,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:05,001 INFO L87 Difference]: Start difference. First operand 193 states and 487 transitions. Second operand 17 states. [2020-04-17 18:46:05,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:05,263 INFO L93 Difference]: Finished difference Result 254 states and 600 transitions. [2020-04-17 18:46:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:05,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:05,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:05,265 INFO L225 Difference]: With dead ends: 254 [2020-04-17 18:46:05,265 INFO L226 Difference]: Without dead ends: 244 [2020-04-17 18:46:05,265 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:05,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-04-17 18:46:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 188. [2020-04-17 18:46:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 18:46:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 18:46:05,270 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 18:46:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:05,271 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 18:46:05,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 18:46:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:05,271 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:05,271 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:05,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:05,475 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-04-17 18:46:05,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:05,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649104318] [2020-04-17 18:46:05,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:05,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649104318] [2020-04-17 18:46:05,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533947310] [2020-04-17 18:46:05,589 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:05,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:05,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:05,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:05,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:05,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762031178] [2020-04-17 18:46:05,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:05,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:05,766 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 17 states. [2020-04-17 18:46:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:05,863 INFO L93 Difference]: Finished difference Result 229 states and 552 transitions. [2020-04-17 18:46:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:05,864 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:05,865 INFO L225 Difference]: With dead ends: 229 [2020-04-17 18:46:05,865 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 18:46:05,865 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 18:46:05,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 18:46:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 194. [2020-04-17 18:46:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-04-17 18:46:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 488 transitions. [2020-04-17 18:46:05,870 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 488 transitions. Word has length 14 [2020-04-17 18:46:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:05,870 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 488 transitions. [2020-04-17 18:46:05,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 488 transitions. [2020-04-17 18:46:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:05,870 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:05,871 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:06,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:06,071 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:06,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-04-17 18:46:06,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:06,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724996213] [2020-04-17 18:46:06,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:06,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724996213] [2020-04-17 18:46:06,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110527234] [2020-04-17 18:46:06,175 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:06,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:06,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:06,216 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:06,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:06,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:06,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:06,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220686946] [2020-04-17 18:46:06,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:06,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:06,339 INFO L87 Difference]: Start difference. First operand 194 states and 488 transitions. Second operand 17 states. [2020-04-17 18:46:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:06,579 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-04-17 18:46:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:06,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:06,581 INFO L225 Difference]: With dead ends: 255 [2020-04-17 18:46:06,581 INFO L226 Difference]: Without dead ends: 253 [2020-04-17 18:46:06,581 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-04-17 18:46:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 192. [2020-04-17 18:46:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:46:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 18:46:06,585 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 18:46:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:06,585 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 18:46:06,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 18:46:06,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:06,586 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:06,586 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:06,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:06,787 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-04-17 18:46:06,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:06,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155232099] [2020-04-17 18:46:06,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:06,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155232099] [2020-04-17 18:46:06,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414803869] [2020-04-17 18:46:06,879 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:06,922 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:06,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:06,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:06,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:11,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:11,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:11,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646023230] [2020-04-17 18:46:11,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:11,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:11,942 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 18:46:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:12,251 INFO L93 Difference]: Finished difference Result 267 states and 630 transitions. [2020-04-17 18:46:12,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:12,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:12,258 INFO L225 Difference]: With dead ends: 267 [2020-04-17 18:46:12,258 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 18:46:12,258 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 18:46:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 190. [2020-04-17 18:46:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 18:46:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 476 transitions. [2020-04-17 18:46:12,262 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 476 transitions. Word has length 14 [2020-04-17 18:46:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:12,262 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 476 transitions. [2020-04-17 18:46:12,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 476 transitions. [2020-04-17 18:46:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:12,263 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:12,263 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:12,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:12,467 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-04-17 18:46:12,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:12,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510832531] [2020-04-17 18:46:12,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:12,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510832531] [2020-04-17 18:46:12,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358973343] [2020-04-17 18:46:12,581 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:12,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:12,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:12,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:12,658 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:23,075 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 18:46:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:23,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:23,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 18:46:23,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443233733] [2020-04-17 18:46:23,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:46:23,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:23,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:46:23,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=229, Unknown=4, NotChecked=0, Total=306 [2020-04-17 18:46:23,077 INFO L87 Difference]: Start difference. First operand 190 states and 476 transitions. Second operand 18 states. [2020-04-17 18:46:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:29,343 INFO L93 Difference]: Finished difference Result 273 states and 641 transitions. [2020-04-17 18:46:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:29,343 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 18:46:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:29,344 INFO L225 Difference]: With dead ends: 273 [2020-04-17 18:46:29,344 INFO L226 Difference]: Without dead ends: 271 [2020-04-17 18:46:29,345 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=234, Invalid=518, Unknown=4, NotChecked=0, Total=756 [2020-04-17 18:46:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-04-17 18:46:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 192. [2020-04-17 18:46:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:46:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 18:46:29,354 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 18:46:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:29,354 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 18:46:29,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:46:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 18:46:29,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:29,355 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:29,355 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:29,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,558 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:29,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-04-17 18:46:29,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:29,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781626408] [2020-04-17 18:46:29,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781626408] [2020-04-17 18:46:29,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66028477] [2020-04-17 18:46:29,642 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,681 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:29,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:29,682 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:29,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:29,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:29,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881817770] [2020-04-17 18:46:29,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:29,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:29,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:29,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:29,836 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 18:46:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:30,203 INFO L93 Difference]: Finished difference Result 280 states and 655 transitions. [2020-04-17 18:46:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:30,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:30,204 INFO L225 Difference]: With dead ends: 280 [2020-04-17 18:46:30,205 INFO L226 Difference]: Without dead ends: 278 [2020-04-17 18:46:30,205 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-04-17 18:46:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 192. [2020-04-17 18:46:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:46:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 18:46:30,208 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 18:46:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:30,209 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 18:46:30,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 18:46:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:30,209 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:30,209 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:30,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:30,410 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:30,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-04-17 18:46:30,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:30,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420422002] [2020-04-17 18:46:30,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420422002] [2020-04-17 18:46:30,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163403318] [2020-04-17 18:46:30,495 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:30,538 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:30,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:30,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:30,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:30,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:30,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711295898] [2020-04-17 18:46:30,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:30,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:30,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:30,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:30,692 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 18:46:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,078 INFO L93 Difference]: Finished difference Result 267 states and 631 transitions. [2020-04-17 18:46:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:31,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,080 INFO L225 Difference]: With dead ends: 267 [2020-04-17 18:46:31,080 INFO L226 Difference]: Without dead ends: 265 [2020-04-17 18:46:31,080 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-04-17 18:46:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 188. [2020-04-17 18:46:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 18:46:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 18:46:31,084 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 18:46:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,089 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 18:46:31,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 18:46:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:31,089 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,089 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:31,290 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,291 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-04-17 18:46:31,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877713580] [2020-04-17 18:46:31,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877713580] [2020-04-17 18:46:31,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117227830] [2020-04-17 18:46:31,409 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:31,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:31,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:31,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302794145] [2020-04-17 18:46:31,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:31,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:31,610 INFO L87 Difference]: Start difference. First operand 188 states and 470 transitions. Second operand 17 states. [2020-04-17 18:46:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,734 INFO L93 Difference]: Finished difference Result 221 states and 536 transitions. [2020-04-17 18:46:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:31,735 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,735 INFO L225 Difference]: With dead ends: 221 [2020-04-17 18:46:31,736 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 18:46:31,736 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 18:46:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 192. [2020-04-17 18:46:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-04-17 18:46:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 482 transitions. [2020-04-17 18:46:31,739 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 482 transitions. Word has length 14 [2020-04-17 18:46:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,739 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 482 transitions. [2020-04-17 18:46:31,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 482 transitions. [2020-04-17 18:46:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:31,740 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,740 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:31,941 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-04-17 18:46:31,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79787628] [2020-04-17 18:46:31,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79787628] [2020-04-17 18:46:32,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642950415] [2020-04-17 18:46:32,040 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:32,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:32,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:32,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:32,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 18:46:32,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444603050] [2020-04-17 18:46:32,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 18:46:32,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 18:46:32,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:32,219 INFO L87 Difference]: Start difference. First operand 192 states and 482 transitions. Second operand 17 states. [2020-04-17 18:46:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,471 INFO L93 Difference]: Finished difference Result 247 states and 588 transitions. [2020-04-17 18:46:32,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:32,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 18:46:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,472 INFO L225 Difference]: With dead ends: 247 [2020-04-17 18:46:32,472 INFO L226 Difference]: Without dead ends: 245 [2020-04-17 18:46:32,473 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-04-17 18:46:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 190. [2020-04-17 18:46:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-04-17 18:46:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 476 transitions. [2020-04-17 18:46:32,476 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 476 transitions. Word has length 14 [2020-04-17 18:46:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,476 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 476 transitions. [2020-04-17 18:46:32,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 18:46:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 476 transitions. [2020-04-17 18:46:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:32,477 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,477 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:32,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,678 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:32,678 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-04-17 18:46:32,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:32,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251496962] [2020-04-17 18:46:32,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251496962] [2020-04-17 18:46:32,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123705311] [2020-04-17 18:46:32,769 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:32,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:32,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:46:32,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:32,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-04-17 18:46:32,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886740566] [2020-04-17 18:46:32,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:32,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:32,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:32,906 INFO L87 Difference]: Start difference. First operand 190 states and 476 transitions. Second operand 14 states. [2020-04-17 18:46:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:33,160 INFO L93 Difference]: Finished difference Result 264 states and 622 transitions. [2020-04-17 18:46:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:33,160 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-04-17 18:46:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:33,160 INFO L225 Difference]: With dead ends: 264 [2020-04-17 18:46:33,160 INFO L226 Difference]: Without dead ends: 260 [2020-04-17 18:46:33,161 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-04-17 18:46:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 188. [2020-04-17 18:46:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 18:46:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 470 transitions. [2020-04-17 18:46:33,163 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 470 transitions. Word has length 14 [2020-04-17 18:46:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:33,164 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 470 transitions. [2020-04-17 18:46:33,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 470 transitions. [2020-04-17 18:46:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:33,164 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:33,164 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2020-04-17 18:46:33,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,365 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-04-17 18:46:33,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:33,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782023285] [2020-04-17 18:46:33,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2020-04-17 18:46:33,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256165708] [2020-04-17 18:46:33,370 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,411 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:33,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:33,411 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:33,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,419 WARN L209 SmtUtils]: Removed 1 from assertion stack [2020-04-17 18:46:33,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,620 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 18:46:33,625 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 18:46:33,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:46:33 BasicIcfg [2020-04-17 18:46:33,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:46:33,626 INFO L168 Benchmark]: Toolchain (without parser) took 287851.34 ms. Allocated memory was 136.8 MB in the beginning and 195.6 MB in the end (delta: 58.7 MB). Free memory was 100.7 MB in the beginning and 92.1 MB in the end (delta: 8.7 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:33,627 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-04-17 18:46:33,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 690.01 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 98.7 MB in the beginning and 157.1 MB in the end (delta: -58.4 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:33,627 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.96 ms. Allocated memory is still 200.3 MB. Free memory was 157.1 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:33,628 INFO L168 Benchmark]: Boogie Preprocessor took 41.65 ms. Allocated memory is still 200.3 MB. Free memory was 155.7 MB in the beginning and 153.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:33,628 INFO L168 Benchmark]: RCFGBuilder took 420.44 ms. Allocated memory is still 200.3 MB. Free memory was 153.6 MB in the beginning and 133.5 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:33,628 INFO L168 Benchmark]: TraceAbstraction took 286601.37 ms. Allocated memory was 200.3 MB in the beginning and 195.6 MB in the end (delta: -4.7 MB). Free memory was 132.8 MB in the beginning and 92.1 MB in the end (delta: 40.7 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:46:33,630 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 136.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 690.01 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 98.7 MB in the beginning and 157.1 MB in the end (delta: -58.4 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.96 ms. Allocated memory is still 200.3 MB. Free memory was 157.1 MB in the beginning and 155.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.65 ms. Allocated memory is still 200.3 MB. Free memory was 155.7 MB in the beginning and 153.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 420.44 ms. Allocated memory is still 200.3 MB. Free memory was 153.6 MB in the beginning and 133.5 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 286601.37 ms. Allocated memory was 200.3 MB in the beginning and 195.6 MB in the end (delta: -4.7 MB). Free memory was 132.8 MB in the beginning and 92.1 MB in the end (delta: 40.7 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 553 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 879 CheckedPairsTotal, 48 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 286.4s, OverallIterations: 176, TraceHistogramMax: 6, AutomataDifference: 135.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 2330 SDtfs, 15248 SDslu, 15386 SDs, 0 SdLazy, 11041 SolverSat, 3982 SolverUnsat, 49 SolverUnknown, 0 SolverNotchecked, 76.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4349 GetRequests, 823 SyntacticMatches, 159 SemanticMatches, 3367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17445 ImplicationChecksByTransitivity, 156.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=157, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 175 MinimizatonAttempts, 8377 StatesRemovedByMinimization, 174 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 104.3s InterpolantComputationTime, 4262 NumberOfCodeBlocks, 4262 NumberOfCodeBlocksAsserted, 527 NumberOfCheckSat, 3920 ConstructedInterpolants, 43 QuantifiedInterpolants, 406207 SizeOfPredicates, 170 NumberOfNonLiveVariables, 14464 ConjunctsInSsa, 1630 ConjunctsInUnsatCore, 342 InterpolantComputations, 9 PerfectInterpolantSequences, 35/1536 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown