/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:41:31,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:41:31,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:41:31,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:41:31,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:41:31,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:41:31,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:41:31,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:41:31,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:41:31,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:41:31,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:41:31,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:41:31,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:41:31,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:41:31,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:41:31,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:41:31,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:41:31,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:41:31,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:41:31,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:41:31,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:41:31,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:41:31,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:41:31,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:41:31,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 11:41:31,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:41:31,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:41:31,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:41:31,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:41:31,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:41:31,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:41:31,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:41:31,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:41:31,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:41:31,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:41:31,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:41:31,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 11:41:31,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:41:31,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:41:31,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:41:31,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:41:31,226 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:41:31,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:41:31,227 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:41:31,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:41:31,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:41:31,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:41:31,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:41:31,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:41:31,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:41:31,230 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:41:31,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:41:31,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:41:31,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:41:31,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:41:31,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:41:31,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:41:31,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:41:31,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:41:31,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:41:31,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:41:31,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:41:31,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:41:31,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:41:31,232 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:41:31,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:41:31,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:41:31,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:41:31,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:41:31,551 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:41:31,554 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:41:31,555 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-16 11:41:31,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6105c2788/202a0519997145db83574b66d5030a5d/FLAG879ca3b3b [2020-10-16 11:41:32,228 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:41:32,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-16 11:41:32,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6105c2788/202a0519997145db83574b66d5030a5d/FLAG879ca3b3b [2020-10-16 11:41:32,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6105c2788/202a0519997145db83574b66d5030a5d [2020-10-16 11:41:32,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:41:32,508 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:41:32,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:32,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:41:32,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:41:32,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:32,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3846ab79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32, skipping insertion in model container [2020-10-16 11:41:32,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:32,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:41:32,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:41:33,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:33,164 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:41:33,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:33,334 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:41:33,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33 WrapperNode [2020-10-16 11:41:33,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:33,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:33,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:41:33,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:41:33,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... [2020-10-16 11:41:33,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... [2020-10-16 11:41:33,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:33,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:41:33,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:41:33,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:41:33,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... [2020-10-16 11:41:33,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... [2020-10-16 11:41:33,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... [2020-10-16 11:41:33,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... [2020-10-16 11:41:33,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... [2020-10-16 11:41:33,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... [2020-10-16 11:41:33,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... [2020-10-16 11:41:33,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:41:33,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:41:33,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:41:33,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:41:33,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:41:33,503 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 11:41:33,504 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 11:41:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 11:41:33,504 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 11:41:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:41:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 11:41:33,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:41:33,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:41:33,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 11:41:33,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:41:33,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:41:33,507 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:41:33,875 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:41:33,876 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:41:33,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:33 BoogieIcfgContainer [2020-10-16 11:41:33,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:41:33,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:41:33,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:41:33,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:41:33,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:41:32" (1/3) ... [2020-10-16 11:41:33,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7441d7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:33, skipping insertion in model container [2020-10-16 11:41:33,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:33" (2/3) ... [2020-10-16 11:41:33,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7441d7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:33, skipping insertion in model container [2020-10-16 11:41:33,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:33" (3/3) ... [2020-10-16 11:41:33,891 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-16 11:41:33,906 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:41:33,906 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:41:33,917 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:41:33,918 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:41:33,950 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,951 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,951 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,951 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,952 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,952 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,953 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,953 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,953 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,954 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,954 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,954 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,955 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,955 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,956 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,956 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,957 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,957 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,957 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,958 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,958 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,958 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,959 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,959 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,959 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,960 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,970 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,970 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,970 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,971 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,981 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,981 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,982 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,982 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,982 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,982 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,986 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 11:41:34,000 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:41:34,020 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:41:34,021 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:41:34,021 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:41:34,021 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:41:34,021 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:41:34,021 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:41:34,022 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:41:34,022 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:41:34,033 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:41:34,034 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:34,038 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:34,040 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:34,085 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 11:41:34,085 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 11:41:34,092 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 11:41:34,095 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 11:41:35,086 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 11:41:35,315 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 11:41:35,316 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 11:41:35,323 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 11:41:35,337 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 11:41:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 11:41:35,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 11:41:35,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,349 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 11:41:35,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981217354] [2020-10-16 11:41:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:35,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981217354] [2020-10-16 11:41:35,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:35,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:41:35,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264496319] [2020-10-16 11:41:35,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:41:35,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:41:35,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:41:35,657 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 11:41:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,729 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 11:41:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:41:35,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 11:41:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,744 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:35,745 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 11:41:35,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:41:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 11:41:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 11:41:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:35,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 11:41:35,791 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 11:41:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,792 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 11:41:35,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:41:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 11:41:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:41:35,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:41:35,794 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 11:41:35,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063991537] [2020-10-16 11:41:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:35,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063991537] [2020-10-16 11:41:35,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:35,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:41:35,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842878546] [2020-10-16 11:41:35,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:41:35,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:41:35,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:41:35,916 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 11:41:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,948 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 11:41:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:41:35,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:41:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,950 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:41:35,950 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 11:41:35,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 11:41:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 11:41:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 11:41:35,960 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 11:41:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,961 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 11:41:35,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:41:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 11:41:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:35,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:41:35,963 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 11:41:35,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206021521] [2020-10-16 11:41:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206021521] [2020-10-16 11:41:36,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:36,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:36,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180068489] [2020-10-16 11:41:36,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:36,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:36,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:36,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:36,040 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-16 11:41:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:36,150 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 11:41:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:36,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:36,154 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:36,154 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:36,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-16 11:41:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:36,172 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-16 11:41:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:36,173 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:36,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:36,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:36,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:36,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:41:36,179 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:36,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-16 11:41:36,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:36,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073734972] [2020-10-16 11:41:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073734972] [2020-10-16 11:41:36,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:36,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:36,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874441654] [2020-10-16 11:41:36,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:36,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:36,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:36,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:36,296 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-16 11:41:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:36,401 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:36,402 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:36,403 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:36,403 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:36,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:36,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-16 11:41:36,414 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-16 11:41:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:36,417 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-16 11:41:36,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-16 11:41:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:36,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:36,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:36,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:41:36,419 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-16 11:41:36,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:36,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965703028] [2020-10-16 11:41:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965703028] [2020-10-16 11:41:36,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:36,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:36,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851654899] [2020-10-16 11:41:36,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:36,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:36,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:36,500 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-16 11:41:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:36,574 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-16 11:41:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:36,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:36,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:36,576 INFO L225 Difference]: With dead ends: 57 [2020-10-16 11:41:36,576 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 11:41:36,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 11:41:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-16 11:41:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:36,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:36,583 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-16 11:41:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:36,583 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:36,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:36,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:36,585 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:36,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 11:41:36,585 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:36,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:36,586 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-16 11:41:36,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:36,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124139435] [2020-10-16 11:41:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124139435] [2020-10-16 11:41:36,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234749446] [2020-10-16 11:41:36,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:36,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:36,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:36,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:36,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:36,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578110723] [2020-10-16 11:41:36,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:36,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:36,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:36,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:36,793 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-16 11:41:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:36,930 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-16 11:41:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:36,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:36,932 INFO L225 Difference]: With dead ends: 48 [2020-10-16 11:41:36,932 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:36,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 11:41:36,938 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-16 11:41:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:36,938 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 11:41:36,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 11:41:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:36,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:36,939 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:37,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 11:41:37,141 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:37,142 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-16 11:41:37,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:37,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382419975] [2020-10-16 11:41:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382419975] [2020-10-16 11:41:37,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76663951] [2020-10-16 11:41:37,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:37,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:37,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:37,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594067960] [2020-10-16 11:41:37,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:37,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:37,327 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-16 11:41:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:37,403 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:37,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:37,404 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:37,405 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 11:41:37,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 11:41:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-16 11:41:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 11:41:37,410 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-16 11:41:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:37,411 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 11:41:37,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 11:41:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:37,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:37,412 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:37,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:37,618 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:37,619 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-16 11:41:37,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:37,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720649365] [2020-10-16 11:41:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720649365] [2020-10-16 11:41:37,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098648998] [2020-10-16 11:41:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:37,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:37,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:37,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:37,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:37,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:37,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:37,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114532341] [2020-10-16 11:41:37,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:37,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:37,844 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-16 11:41:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:37,977 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-16 11:41:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:41:37,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:37,979 INFO L225 Difference]: With dead ends: 58 [2020-10-16 11:41:37,979 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 11:41:37,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 11:41:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-16 11:41:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:37,985 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-16 11:41:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:37,985 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:37,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:37,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:37,986 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:38,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,198 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:38,198 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-16 11:41:38,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:38,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111363984] [2020-10-16 11:41:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111363984] [2020-10-16 11:41:38,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333048015] [2020-10-16 11:41:38,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:38,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:38,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:38,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800749355] [2020-10-16 11:41:38,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:38,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:38,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:38,353 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-16 11:41:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:38,486 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:41:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:38,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:38,488 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:38,488 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:41:38,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:41:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-16 11:41:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-16 11:41:38,507 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-16 11:41:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:38,507 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-16 11:41:38,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-16 11:41:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:38,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:38,508 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:38,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,709 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:38,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:38,710 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-16 11:41:38,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:38,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918835049] [2020-10-16 11:41:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918835049] [2020-10-16 11:41:38,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074604173] [2020-10-16 11:41:38,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:38,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:38,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:38,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:38,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:38,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:38,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584739027] [2020-10-16 11:41:38,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:38,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:38,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:38,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:38,863 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-16 11:41:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:39,003 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-16 11:41:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:39,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:39,004 INFO L225 Difference]: With dead ends: 62 [2020-10-16 11:41:39,004 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:39,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:41:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-16 11:41:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 11:41:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-16 11:41:39,009 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-16 11:41:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:39,009 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-16 11:41:39,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-16 11:41:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:39,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:39,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:39,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 11:41:39,220 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:39,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-16 11:41:39,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:39,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479696851] [2020-10-16 11:41:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479696851] [2020-10-16 11:41:39,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21986376] [2020-10-16 11:41:39,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:39,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:41:39,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:39,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:39,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:39,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:39,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523639135] [2020-10-16 11:41:39,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:39,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:39,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:39,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:39,346 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-16 11:41:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:39,439 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-16 11:41:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:39,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:39,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:39,440 INFO L225 Difference]: With dead ends: 64 [2020-10-16 11:41:39,441 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 11:41:39,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 11:41:39,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 11:41:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:41:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-16 11:41:39,445 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-16 11:41:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:39,445 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-16 11:41:39,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-16 11:41:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:39,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:39,446 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:39,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:39,656 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-16 11:41:39,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:39,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943386738] [2020-10-16 11:41:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943386738] [2020-10-16 11:41:39,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066675659] [2020-10-16 11:41:39,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:39,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:39,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:39,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:39,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:39,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:39,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409252055] [2020-10-16 11:41:39,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:39,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:39,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:39,809 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-16 11:41:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:39,976 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-16 11:41:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:39,977 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:39,978 INFO L225 Difference]: With dead ends: 61 [2020-10-16 11:41:39,979 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:39,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-16 11:41:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:39,984 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-16 11:41:39,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:39,985 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:39,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:39,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:39,986 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:40,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:40,199 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:40,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-16 11:41:40,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:40,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118332797] [2020-10-16 11:41:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118332797] [2020-10-16 11:41:40,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486649559] [2020-10-16 11:41:40,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:40,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:40,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:40,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:40,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367256825] [2020-10-16 11:41:40,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:40,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:40,361 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-16 11:41:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:40,510 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:41:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:40,511 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:40,512 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:40,512 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:40,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:41:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-16 11:41:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-16 11:41:40,517 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-16 11:41:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:40,517 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-16 11:41:40,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-16 11:41:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:40,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:40,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:40,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:41:40,725 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-16 11:41:40,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:40,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538207303] [2020-10-16 11:41:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538207303] [2020-10-16 11:41:40,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370151732] [2020-10-16 11:41:40,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:40,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:40,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:40,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:40,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:40,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:40,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598705084] [2020-10-16 11:41:40,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:40,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:40,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:40,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:40,874 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-16 11:41:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:41,045 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-16 11:41:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:41,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:41,047 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:41:41,047 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 11:41:41,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 11:41:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-16 11:41:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 11:41:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-16 11:41:41,052 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-16 11:41:41,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:41,052 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-16 11:41:41,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-16 11:41:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:41,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:41,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:41,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:41,256 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-16 11:41:41,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:41,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093349873] [2020-10-16 11:41:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:41,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093349873] [2020-10-16 11:41:41,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135328066] [2020-10-16 11:41:41,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:41,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:41,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:41,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:41,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:41,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644298819] [2020-10-16 11:41:41,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:41,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:41,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:41,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:41,416 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-16 11:41:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:41,590 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-16 11:41:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:41,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:41,591 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:41,592 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:41,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-16 11:41:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:41,597 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-16 11:41:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:41,598 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:41,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:41,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:41,600 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:41,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 11:41:41,800 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-16 11:41:41,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:41,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159280344] [2020-10-16 11:41:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159280344] [2020-10-16 11:41:41,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589779675] [2020-10-16 11:41:41,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:41,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:41,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:41,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:41,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:41,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:41,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028404721] [2020-10-16 11:41:41,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:41,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:41,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:41,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:41,993 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-16 11:41:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,204 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-16 11:41:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:42,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:42,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,205 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:42,205 INFO L226 Difference]: Without dead ends: 49 [2020-10-16 11:41:42,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-16 11:41:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-16 11:41:42,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 11:41:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 11:41:42,209 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-16 11:41:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,209 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 11:41:42,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 11:41:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:42,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,210 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:41:42,419 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-16 11:41:42,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043537258] [2020-10-16 11:41:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043537258] [2020-10-16 11:41:42,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650828284] [2020-10-16 11:41:42,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:42,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:42,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:42,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:42,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:42,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066785718] [2020-10-16 11:41:42,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:42,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:42,568 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-16 11:41:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,672 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-16 11:41:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:42,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,674 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:42,674 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:42,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:41:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 11:41:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 11:41:42,678 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-16 11:41:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,679 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 11:41:42,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 11:41:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:42,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,680 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:41:42,890 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,891 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-16 11:41:42,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578832729] [2020-10-16 11:41:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578832729] [2020-10-16 11:41:42,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942286621] [2020-10-16 11:41:42,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:43,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:43,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:43,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:43,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:43,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:43,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:43,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993014387] [2020-10-16 11:41:43,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:43,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:43,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:43,048 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-16 11:41:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,184 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-16 11:41:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:43,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,185 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:43,185 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:43,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-16 11:41:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:43,188 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-16 11:41:43,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,189 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:43,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:43,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,190 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:43,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:41:43,390 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:43,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:43,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-16 11:41:43,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:43,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520210100] [2020-10-16 11:41:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520210100] [2020-10-16 11:41:43,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25722902] [2020-10-16 11:41:43,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:43,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:43,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:43,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:43,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:43,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:43,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468990731] [2020-10-16 11:41:43,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:43,564 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-16 11:41:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,735 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-16 11:41:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:43,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,737 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:43,737 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:43,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-16 11:41:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 11:41:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-16 11:41:43,741 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-16 11:41:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,741 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-16 11:41:43,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-16 11:41:43,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:43,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,742 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:43,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:43,951 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:43,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-16 11:41:43,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:43,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232452590] [2020-10-16 11:41:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232452590] [2020-10-16 11:41:44,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230991680] [2020-10-16 11:41:44,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:44,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:44,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:44,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:44,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:44,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362495298] [2020-10-16 11:41:44,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:44,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:44,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:44,090 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-16 11:41:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,296 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-16 11:41:44,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:44,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,297 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:44,297 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:44,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 11:41:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:44,303 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-16 11:41:44,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,303 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:44,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:44,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:44,304 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:44,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:44,512 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:44,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-16 11:41:44,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:44,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641845281] [2020-10-16 11:41:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641845281] [2020-10-16 11:41:44,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938678318] [2020-10-16 11:41:44,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:44,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:44,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608701845] [2020-10-16 11:41:44,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:44,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:44,649 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-16 11:41:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,860 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:41:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:44,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,864 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:41:44,864 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:41:44,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:41:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-16 11:41:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-16 11:41:44,872 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-16 11:41:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,872 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-16 11:41:44,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-16 11:41:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:44,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:44,873 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:45,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:45,074 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:45,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:45,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-16 11:41:45,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:45,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589766707] [2020-10-16 11:41:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589766707] [2020-10-16 11:41:45,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954547333] [2020-10-16 11:41:45,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:45,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:45,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:45,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:45,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:45,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749920578] [2020-10-16 11:41:45,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:45,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:45,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:45,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:45,219 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-16 11:41:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:45,452 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 11:41:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:45,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:45,453 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:45,453 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:45,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:45,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-16 11:41:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:41:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-16 11:41:45,457 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-16 11:41:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:45,457 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-16 11:41:45,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-16 11:41:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:45,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:45,458 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:45,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:41:45,667 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:45,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-16 11:41:45,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:45,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851426277] [2020-10-16 11:41:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851426277] [2020-10-16 11:41:45,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426539117] [2020-10-16 11:41:45,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:45,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:45,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:45,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:45,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462980942] [2020-10-16 11:41:45,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:45,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:45,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:45,820 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-16 11:41:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:45,965 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 11:41:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:45,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:45,966 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:45,966 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:45,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:41:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-16 11:41:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:45,970 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:45,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:45,970 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:45,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:45,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:45,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:46,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 11:41:46,180 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-16 11:41:46,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:46,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313412618] [2020-10-16 11:41:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313412618] [2020-10-16 11:41:46,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100927627] [2020-10-16 11:41:46,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:46,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:46,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:46,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:46,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674834309] [2020-10-16 11:41:46,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:46,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:46,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:46,348 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:46,543 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-16 11:41:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:46,543 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:46,544 INFO L225 Difference]: With dead ends: 71 [2020-10-16 11:41:46,544 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 11:41:46,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 11:41:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-16 11:41:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:46,548 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:46,548 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:46,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:46,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:46,549 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:46,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 11:41:46,754 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-16 11:41:46,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:46,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761999938] [2020-10-16 11:41:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761999938] [2020-10-16 11:41:46,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018817597] [2020-10-16 11:41:46,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:46,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:46,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:46,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:46,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:46,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600518328] [2020-10-16 11:41:46,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:46,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:46,895 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:47,076 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-16 11:41:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:47,077 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:47,078 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:47,078 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 11:41:47,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 11:41:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-16 11:41:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:47,081 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:47,082 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:47,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:47,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:47,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:47,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 11:41:47,291 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-16 11:41:47,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:47,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863276702] [2020-10-16 11:41:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:47,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863276702] [2020-10-16 11:41:47,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499645703] [2020-10-16 11:41:47,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:47,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:47,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:47,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:47,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:47,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:47,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:47,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:47,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6030849] [2020-10-16 11:41:47,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:47,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:47,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:47,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:47,443 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:47,705 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-16 11:41:47,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:47,705 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:47,706 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:47,707 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:47,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:47,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-16 11:41:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:47,710 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:47,710 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:47,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:47,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:47,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:47,711 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:47,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:41:47,912 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:47,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-16 11:41:47,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:47,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321450971] [2020-10-16 11:41:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:47,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321450971] [2020-10-16 11:41:47,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365231665] [2020-10-16 11:41:47,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:48,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:48,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:48,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682584247] [2020-10-16 11:41:48,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:48,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:48,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:48,041 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:48,265 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 11:41:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:48,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:48,267 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:41:48,267 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:41:48,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:41:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-16 11:41:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:41:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-16 11:41:48,271 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-16 11:41:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:48,271 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-16 11:41:48,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-16 11:41:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:48,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:48,272 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:48,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:48,481 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-16 11:41:48,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:48,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474233895] [2020-10-16 11:41:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474233895] [2020-10-16 11:41:48,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445042611] [2020-10-16 11:41:48,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:48,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:48,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:48,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:48,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:48,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804971618] [2020-10-16 11:41:48,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:48,661 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-16 11:41:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:48,946 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-16 11:41:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:48,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:48,947 INFO L225 Difference]: With dead ends: 62 [2020-10-16 11:41:48,947 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:48,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-16 11:41:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 11:41:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-16 11:41:48,952 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-16 11:41:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:48,952 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-16 11:41:48,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-16 11:41:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:48,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:48,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:41:49,164 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-16 11:41:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776689101] [2020-10-16 11:41:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776689101] [2020-10-16 11:41:49,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907071132] [2020-10-16 11:41:49,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:49,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:49,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:49,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:49,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:49,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:49,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:49,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110060704] [2020-10-16 11:41:49,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:49,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:49,306 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-16 11:41:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:49,582 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-16 11:41:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:49,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:49,583 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:49,583 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:49,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-16 11:41:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:41:49,587 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-16 11:41:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:49,587 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:41:49,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:41:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:49,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:49,588 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:41:49,789 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-16 11:41:49,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341876058] [2020-10-16 11:41:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341876058] [2020-10-16 11:41:49,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787703586] [2020-10-16 11:41:49,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:49,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:49,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:49,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:49,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:49,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:49,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:49,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787674983] [2020-10-16 11:41:49,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:49,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:49,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:49,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:49,936 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-16 11:41:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:50,244 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-16 11:41:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:50,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:50,246 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:50,246 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:50,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-16 11:41:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 11:41:50,249 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-16 11:41:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:50,249 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 11:41:50,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 11:41:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:50,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:50,250 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:50,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:50,454 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:50,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-16 11:41:50,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:50,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151682085] [2020-10-16 11:41:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151682085] [2020-10-16 11:41:50,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653708659] [2020-10-16 11:41:50,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:50,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:50,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:50,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:50,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:50,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068465963] [2020-10-16 11:41:50,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:50,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:50,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:50,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:50,664 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-16 11:41:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:50,812 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-16 11:41:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:50,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:50,814 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:50,814 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:50,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:41:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 11:41:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 11:41:50,817 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-16 11:41:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:50,817 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 11:41:50,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 11:41:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:50,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:50,818 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:51,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:51,029 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:51,029 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-16 11:41:51,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:51,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468899597] [2020-10-16 11:41:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468899597] [2020-10-16 11:41:51,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365965517] [2020-10-16 11:41:51,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:51,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:51,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:51,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:51,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:51,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904769447] [2020-10-16 11:41:51,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:51,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:51,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:51,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:51,228 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-16 11:41:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:51,405 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-16 11:41:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:51,406 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:51,407 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:51,407 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:51,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 11:41:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-16 11:41:51,410 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-16 11:41:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:51,410 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-16 11:41:51,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-16 11:41:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:51,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:51,411 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:51,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 11:41:51,612 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:51,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-16 11:41:51,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:51,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860720043] [2020-10-16 11:41:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860720043] [2020-10-16 11:41:51,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762648711] [2020-10-16 11:41:51,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:51,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:51,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:51,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245369893] [2020-10-16 11:41:51,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:51,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:51,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:51,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:51,751 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-16 11:41:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:51,938 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-16 11:41:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:51,939 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:51,940 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:51,940 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:41:51,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:41:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-16 11:41:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:51,943 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-16 11:41:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:51,944 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:51,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:51,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:51,944 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:52,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:52,154 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-16 11:41:52,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:52,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098812296] [2020-10-16 11:41:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098812296] [2020-10-16 11:41:52,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540203729] [2020-10-16 11:41:52,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:52,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:52,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:52,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:52,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:52,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:52,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:52,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707307477] [2020-10-16 11:41:52,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:52,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:52,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:52,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:52,317 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-16 11:41:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:52,585 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-16 11:41:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:52,586 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:52,588 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:41:52,588 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:41:52,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:41:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-16 11:41:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:52,591 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-16 11:41:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:52,591 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:52,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:52,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:52,592 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:52,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 11:41:52,801 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-16 11:41:52,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:52,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283717261] [2020-10-16 11:41:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283717261] [2020-10-16 11:41:52,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079425020] [2020-10-16 11:41:52,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:53,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:53,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:53,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:53,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20514857] [2020-10-16 11:41:53,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:53,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:53,031 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-16 11:41:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:53,291 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-16 11:41:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:53,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:53,292 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:41:53,292 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:41:53,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:41:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-16 11:41:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:41:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-16 11:41:53,295 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-16 11:41:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:53,296 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-16 11:41:53,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-16 11:41:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:53,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:53,297 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:53,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:53,497 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:53,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:53,498 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-16 11:41:53,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:53,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223847706] [2020-10-16 11:41:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223847706] [2020-10-16 11:41:53,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314033357] [2020-10-16 11:41:53,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:53,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:53,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:53,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:53,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:53,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:53,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650378862] [2020-10-16 11:41:53,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:53,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:53,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:53,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:53,651 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-16 11:41:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:53,960 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-16 11:41:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:53,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:53,961 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:41:53,962 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:41:53,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:41:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-16 11:41:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:41:53,965 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-16 11:41:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:53,965 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:41:53,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:53,966 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:41:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:53,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:53,966 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:54,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 11:41:54,172 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:54,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:54,172 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-16 11:41:54,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:54,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145741974] [2020-10-16 11:41:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145741974] [2020-10-16 11:41:54,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262585075] [2020-10-16 11:41:54,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:54,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:54,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:54,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:54,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627464916] [2020-10-16 11:41:54,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:54,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:54,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:54,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:54,304 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-16 11:41:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:54,611 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-16 11:41:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:41:54,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:54,614 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:41:54,614 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:41:54,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:41:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-16 11:41:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:41:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-16 11:41:54,618 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-16 11:41:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:54,618 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-16 11:41:54,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-16 11:41:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:54,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:54,619 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:54,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:41:54,823 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:54,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:54,823 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-16 11:41:54,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:54,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534617600] [2020-10-16 11:41:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534617600] [2020-10-16 11:41:54,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308692608] [2020-10-16 11:41:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:54,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:54,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:54,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:54,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:54,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:54,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:54,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199020815] [2020-10-16 11:41:54,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:54,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:54,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:54,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:54,982 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-16 11:41:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:55,322 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-16 11:41:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:55,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:55,324 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:55,324 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:41:55,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:41:55,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 11:41:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:41:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-16 11:41:55,328 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-16 11:41:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:55,328 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-16 11:41:55,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-16 11:41:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:55,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:55,329 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:55,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 11:41:55,534 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:55,534 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-16 11:41:55,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:55,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895966762] [2020-10-16 11:41:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895966762] [2020-10-16 11:41:55,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929287877] [2020-10-16 11:41:55,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:55,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:55,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:55,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:55,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306882518] [2020-10-16 11:41:55,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:55,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:55,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:55,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:55,753 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-16 11:41:55,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:55,999 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 11:41:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:56,000 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:56,001 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:41:56,001 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:41:56,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:56,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:41:56,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-16 11:41:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:41:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:41:56,005 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:41:56,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:56,006 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:41:56,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:56,006 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:41:56,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:56,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:56,007 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:56,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:41:56,220 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:56,220 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-16 11:41:56,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:56,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54092417] [2020-10-16 11:41:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54092417] [2020-10-16 11:41:56,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690670188] [2020-10-16 11:41:56,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:56,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:56,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:56,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:56,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:56,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:56,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:56,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238732003] [2020-10-16 11:41:56,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:56,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:56,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:56,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:56,469 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:41:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:56,705 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 11:41:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:56,706 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:56,707 INFO L225 Difference]: With dead ends: 81 [2020-10-16 11:41:56,707 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:41:56,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:41:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-16 11:41:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:41:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:41:56,711 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:41:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:56,711 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:41:56,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:41:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:56,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:56,712 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:56,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:41:56,921 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:56,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-16 11:41:56,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:56,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740598288] [2020-10-16 11:41:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740598288] [2020-10-16 11:41:57,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675950259] [2020-10-16 11:41:57,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:57,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:57,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:57,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:57,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:57,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:57,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002755103] [2020-10-16 11:41:57,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:57,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:57,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:57,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:57,100 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:41:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:57,346 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:41:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:57,346 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:57,348 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:57,348 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:41:57,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:41:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:41:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-16 11:41:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:41:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:41:57,351 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:41:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:57,351 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:41:57,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:41:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:57,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:57,352 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:57,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 11:41:57,561 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:57,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:57,562 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-16 11:41:57,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:57,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659028058] [2020-10-16 11:41:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659028058] [2020-10-16 11:41:57,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367926617] [2020-10-16 11:41:57,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:57,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:57,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:57,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:57,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:57,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143347780] [2020-10-16 11:41:57,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:57,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:57,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:57,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:57,721 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:41:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:58,035 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:41:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:58,035 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:58,036 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:58,036 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:58,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-16 11:41:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:41:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:41:58,040 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:41:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:58,041 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:41:58,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:41:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:58,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:58,041 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:58,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 11:41:58,242 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:58,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:58,243 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-16 11:41:58,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:58,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028041728] [2020-10-16 11:41:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028041728] [2020-10-16 11:41:58,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768146482] [2020-10-16 11:41:58,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:58,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:58,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:58,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:58,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:58,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:58,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298819643] [2020-10-16 11:41:58,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:58,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:58,392 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:41:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:58,659 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-16 11:41:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:58,660 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:58,661 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:58,661 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:58,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-16 11:41:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:41:58,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:41:58,664 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:41:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:58,664 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:41:58,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:41:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:58,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:58,665 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:58,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:58,875 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:58,875 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-16 11:41:58,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:58,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625094578] [2020-10-16 11:41:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625094578] [2020-10-16 11:41:58,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929287305] [2020-10-16 11:41:58,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:59,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:59,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:59,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:59,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:59,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:59,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:59,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547886638] [2020-10-16 11:41:59,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:59,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:59,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:59,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:59,055 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:41:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:59,519 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-16 11:41:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:59,520 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:59,521 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:41:59,521 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:41:59,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:41:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:41:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-16 11:41:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:41:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:41:59,528 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:41:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:59,528 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:41:59,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:41:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:59,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:59,529 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:59,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 11:41:59,730 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:59,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:59,731 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-16 11:41:59,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:59,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567128249] [2020-10-16 11:41:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567128249] [2020-10-16 11:41:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379961950] [2020-10-16 11:41:59,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:59,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:59,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:59,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:59,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129703146] [2020-10-16 11:41:59,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:59,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:59,873 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:42:00,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:00,176 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 11:42:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:00,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:42:00,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:00,178 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:00,178 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:00,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 11:42:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-16 11:42:00,182 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-16 11:42:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:00,182 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-16 11:42:00,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:42:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-16 11:42:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:00,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:00,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:00,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:00,391 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-16 11:42:00,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:00,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589118269] [2020-10-16 11:42:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:00,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589118269] [2020-10-16 11:42:00,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560117213] [2020-10-16 11:42:00,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:00,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:00,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:00,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:00,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:00,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:00,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:00,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171636541] [2020-10-16 11:42:00,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:00,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:00,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:00,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:00,560 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-16 11:42:00,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:00,918 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-16 11:42:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:00,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:00,919 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:42:00,920 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:42:00,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:42:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-16 11:42:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:42:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-16 11:42:00,923 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-16 11:42:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:00,923 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-16 11:42:00,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-16 11:42:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:42:00,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:00,924 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:01,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:42:01,133 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:01,134 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-16 11:42:01,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:01,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458957317] [2020-10-16 11:42:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458957317] [2020-10-16 11:42:01,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304128860] [2020-10-16 11:42:01,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:01,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:42:01,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:42:01,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:01,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:01,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:42:01,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566740407] [2020-10-16 11:42:01,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:01,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:01,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:01,330 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-16 11:42:01,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:01,706 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-16 11:42:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:01,706 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:01,707 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:01,707 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:42:01,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:01,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:42:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-16 11:42:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:01,710 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-16 11:42:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:01,711 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:01,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:01,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:01,711 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:01,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:01,921 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:01,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-16 11:42:01,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:01,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530780741] [2020-10-16 11:42:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530780741] [2020-10-16 11:42:02,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530871789] [2020-10-16 11:42:02,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:02,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:02,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:02,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:02,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:02,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:02,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:02,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547161344] [2020-10-16 11:42:02,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:02,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:02,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:02,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:02,079 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-16 11:42:02,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:02,479 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-16 11:42:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:02,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:02,481 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:42:02,481 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:42:02,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:02,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:42:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-16 11:42:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:42:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 11:42:02,485 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-16 11:42:02,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:02,485 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 11:42:02,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 11:42:02,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:02,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:02,486 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:02,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 11:42:02,694 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-16 11:42:02,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:02,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633025856] [2020-10-16 11:42:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633025856] [2020-10-16 11:42:02,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212802333] [2020-10-16 11:42:02,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:02,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:02,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:02,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:02,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:02,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356286776] [2020-10-16 11:42:02,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:02,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:02,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:02,869 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-16 11:42:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:03,069 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-16 11:42:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:42:03,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:03,071 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:42:03,071 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 11:42:03,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:42:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 11:42:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 11:42:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 11:42:03,076 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-16 11:42:03,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:03,076 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 11:42:03,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 11:42:03,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:03,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:03,077 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:03,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 11:42:03,288 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:03,289 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-16 11:42:03,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:03,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4896125] [2020-10-16 11:42:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4896125] [2020-10-16 11:42:03,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192542856] [2020-10-16 11:42:03,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:03,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:03,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:03,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:03,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:03,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:03,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:03,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897992659] [2020-10-16 11:42:03,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:03,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:03,481 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-16 11:42:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:03,693 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-16 11:42:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:42:03,693 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:03,694 INFO L225 Difference]: With dead ends: 82 [2020-10-16 11:42:03,695 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 11:42:03,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:42:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 11:42:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 11:42:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:42:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-16 11:42:03,698 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-16 11:42:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:03,698 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-16 11:42:03,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-16 11:42:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:03,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:03,699 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:03,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 11:42:03,909 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:03,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:03,910 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-16 11:42:03,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:03,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031906115] [2020-10-16 11:42:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031906115] [2020-10-16 11:42:04,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518710221] [2020-10-16 11:42:04,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:04,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:04,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:04,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682863156] [2020-10-16 11:42:04,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:04,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:04,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:04,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:04,067 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-16 11:42:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:04,310 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-16 11:42:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:04,311 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:04,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:04,312 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:42:04,312 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:04,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:42:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-16 11:42:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:42:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-16 11:42:04,316 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-16 11:42:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:04,316 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-16 11:42:04,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-16 11:42:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:04,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:04,317 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:04,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 11:42:04,526 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:04,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-16 11:42:04,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:04,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393404882] [2020-10-16 11:42:04,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393404882] [2020-10-16 11:42:04,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829541846] [2020-10-16 11:42:04,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:04,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:04,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:04,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:04,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:04,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:04,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045341819] [2020-10-16 11:42:04,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:04,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:04,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:04,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:04,726 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-16 11:42:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:05,004 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-16 11:42:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:05,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:05,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:05,009 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:05,009 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:05,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-16 11:42:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-16 11:42:05,011 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-16 11:42:05,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:05,012 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-16 11:42:05,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:05,012 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-16 11:42:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:05,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:05,012 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:05,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:05,213 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:05,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-16 11:42:05,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:05,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412266227] [2020-10-16 11:42:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412266227] [2020-10-16 11:42:05,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798575464] [2020-10-16 11:42:05,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:05,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:05,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:05,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:05,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:05,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:05,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613811949] [2020-10-16 11:42:05,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:05,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:05,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:05,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:05,377 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-16 11:42:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:05,671 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-16 11:42:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:05,672 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:05,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:05,673 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:05,673 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:05,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-16 11:42:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:05,676 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-16 11:42:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:05,676 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:05,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:05,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:05,677 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:05,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:05,877 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:05,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:05,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-16 11:42:05,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:05,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282323713] [2020-10-16 11:42:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282323713] [2020-10-16 11:42:05,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707556810] [2020-10-16 11:42:05,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:06,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:06,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:06,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:06,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:06,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:06,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111437210] [2020-10-16 11:42:06,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:06,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:06,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:06,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:06,066 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-16 11:42:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:06,428 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-16 11:42:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:06,429 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:06,430 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:42:06,430 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:42:06,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:42:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-16 11:42:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:06,433 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-16 11:42:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:06,434 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:06,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:06,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:06,434 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:06,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 11:42:06,638 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:06,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-16 11:42:06,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:06,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741550169] [2020-10-16 11:42:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741550169] [2020-10-16 11:42:06,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625496006] [2020-10-16 11:42:06,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:06,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:06,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:06,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490472495] [2020-10-16 11:42:06,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:06,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:06,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:06,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:06,799 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-16 11:42:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:07,125 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-16 11:42:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:07,126 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:07,127 INFO L225 Difference]: With dead ends: 87 [2020-10-16 11:42:07,127 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:42:07,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:42:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-16 11:42:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:42:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-16 11:42:07,130 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-16 11:42:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:07,131 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-16 11:42:07,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-16 11:42:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:07,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:07,131 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:07,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:07,340 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-16 11:42:07,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:07,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891854125] [2020-10-16 11:42:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:07,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891854125] [2020-10-16 11:42:07,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616877159] [2020-10-16 11:42:07,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:07,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:07,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:07,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:07,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:07,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:07,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:07,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:07,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613134641] [2020-10-16 11:42:07,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:07,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:07,515 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-16 11:42:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:07,955 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-16 11:42:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:07,955 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:07,956 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:07,956 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:07,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-16 11:42:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:07,960 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-16 11:42:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:07,960 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:07,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:07,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:07,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:07,961 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:08,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 11:42:08,169 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-16 11:42:08,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:08,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018980037] [2020-10-16 11:42:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018980037] [2020-10-16 11:42:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737800797] [2020-10-16 11:42:08,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:08,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:08,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:08,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:08,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951857169] [2020-10-16 11:42:08,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:08,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:08,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:08,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:08,314 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-16 11:42:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:08,689 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 11:42:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:08,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:08,691 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:08,691 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:08,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-16 11:42:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-16 11:42:08,694 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-16 11:42:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:08,695 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-16 11:42:08,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-16 11:42:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:08,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:08,695 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:08,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 11:42:08,896 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:08,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-16 11:42:08,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:08,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858081446] [2020-10-16 11:42:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858081446] [2020-10-16 11:42:08,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334567680] [2020-10-16 11:42:08,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:09,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:09,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:09,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:09,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:09,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:09,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:09,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109671704] [2020-10-16 11:42:09,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:09,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:09,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:09,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:09,054 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-16 11:42:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:09,538 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-16 11:42:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:09,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:09,540 INFO L225 Difference]: With dead ends: 85 [2020-10-16 11:42:09,540 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:09,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:09,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-16 11:42:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:42:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-16 11:42:09,543 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-16 11:42:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:09,544 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-16 11:42:09,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-16 11:42:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:09,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:09,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:09,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 11:42:09,746 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:09,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:09,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-16 11:42:09,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:09,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740744077] [2020-10-16 11:42:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:09,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740744077] [2020-10-16 11:42:09,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628758979] [2020-10-16 11:42:09,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:09,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:09,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:09,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:09,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:09,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940090884] [2020-10-16 11:42:09,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:09,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:09,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:09,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:09,974 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-16 11:42:10,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:10,183 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 11:42:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:10,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:10,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:10,184 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:10,185 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:10,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:42:10,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-16 11:42:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:10,187 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:10,188 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:10,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:10,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:10,188 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:10,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 11:42:10,396 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:10,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-16 11:42:10,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:10,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250381467] [2020-10-16 11:42:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:10,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250381467] [2020-10-16 11:42:10,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477023582] [2020-10-16 11:42:10,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:10,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:10,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:10,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:10,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:10,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:10,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:10,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168265964] [2020-10-16 11:42:10,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:10,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:10,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:10,593 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:10,906 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-16 11:42:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:10,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:10,908 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:42:10,908 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:10,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 11:42:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:10,911 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:10,912 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:10,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:10,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:10,912 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:11,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 11:42:11,122 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:11,122 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-16 11:42:11,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:11,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564896938] [2020-10-16 11:42:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:11,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564896938] [2020-10-16 11:42:11,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650252083] [2020-10-16 11:42:11,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:11,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:11,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:11,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:11,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:11,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777082244] [2020-10-16 11:42:11,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:11,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:11,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:11,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:11,296 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:11,582 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:42:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:11,583 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:11,584 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:42:11,584 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:42:11,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:42:11,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-16 11:42:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:11,587 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:11,587 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:11,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:11,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:11,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:11,588 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:11,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:11,797 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-16 11:42:11,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:11,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811343040] [2020-10-16 11:42:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:11,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811343040] [2020-10-16 11:42:11,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764394689] [2020-10-16 11:42:11,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:11,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:11,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:11,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:11,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:12,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:12,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:12,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:12,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930027722] [2020-10-16 11:42:12,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:12,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:12,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:12,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:12,016 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:12,379 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-16 11:42:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:12,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:12,381 INFO L225 Difference]: With dead ends: 87 [2020-10-16 11:42:12,381 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:42:12,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:42:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-16 11:42:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:12,386 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:12,386 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:12,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:12,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:12,387 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:12,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:12,598 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:12,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:12,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-16 11:42:12,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:12,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834385940] [2020-10-16 11:42:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:12,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834385940] [2020-10-16 11:42:12,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738842827] [2020-10-16 11:42:12,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:12,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:12,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:12,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:12,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640779114] [2020-10-16 11:42:12,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:12,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:12,781 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:13,109 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 11:42:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:13,109 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:13,110 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:13,110 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:13,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:13,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-16 11:42:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:13,113 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:13,114 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:13,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:13,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:13,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:13,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 11:42:13,315 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-16 11:42:13,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:13,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336560493] [2020-10-16 11:42:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336560493] [2020-10-16 11:42:13,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513312664] [2020-10-16 11:42:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:13,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:13,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:13,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:13,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:13,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:13,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432387982] [2020-10-16 11:42:13,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:13,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:13,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:13,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:13,490 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:13,908 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 11:42:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:13,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:13,910 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:42:13,910 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:13,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-16 11:42:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:13,914 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:13,914 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:13,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:13,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:13,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:13,915 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:14,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:14,122 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-16 11:42:14,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:14,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918282923] [2020-10-16 11:42:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918282923] [2020-10-16 11:42:14,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907390975] [2020-10-16 11:42:14,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:14,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:14,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:14,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:14,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:14,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:14,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:14,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723987488] [2020-10-16 11:42:14,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:14,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:14,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:14,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:14,297 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:14,682 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-16 11:42:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:14,683 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:14,684 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:42:14,684 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 11:42:14,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 11:42:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-16 11:42:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:14,688 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:14,688 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:14,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:14,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:14,688 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:14,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 11:42:14,889 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-16 11:42:14,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:14,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924165753] [2020-10-16 11:42:14,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:14,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924165753] [2020-10-16 11:42:14,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175669244] [2020-10-16 11:42:14,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:15,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:15,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:15,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:15,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:15,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:15,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:15,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259341596] [2020-10-16 11:42:15,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:15,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:15,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:15,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:15,075 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:15,603 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-16 11:42:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:15,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:15,605 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:42:15,605 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:42:15,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:42:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-16 11:42:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:15,608 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:15,609 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:15,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:15,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:15,609 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:15,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:15,810 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-16 11:42:15,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:15,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097733365] [2020-10-16 11:42:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:15,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097733365] [2020-10-16 11:42:15,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121091055] [2020-10-16 11:42:15,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:15,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:15,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:15,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:15,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:15,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:15,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:15,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574493394] [2020-10-16 11:42:15,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:15,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:15,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:15,970 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:16,385 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 11:42:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:16,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:16,386 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:42:16,387 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:42:16,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:42:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-16 11:42:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:42:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-16 11:42:16,390 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-16 11:42:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:16,391 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-16 11:42:16,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-16 11:42:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:16,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:16,391 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:16,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 11:42:16,592 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-16 11:42:16,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:16,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626777128] [2020-10-16 11:42:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:16,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626777128] [2020-10-16 11:42:16,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295814082] [2020-10-16 11:42:16,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:16,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:16,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:16,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:16,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:16,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:16,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091610725] [2020-10-16 11:42:16,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:16,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:16,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:16,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:16,762 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-16 11:42:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:17,327 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-16 11:42:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:17,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:17,329 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:17,329 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:42:17,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:42:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-16 11:42:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:42:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-16 11:42:17,331 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-16 11:42:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:17,332 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-16 11:42:17,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:17,332 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-16 11:42:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:17,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:17,332 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:17,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:17,533 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:17,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-16 11:42:17,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:17,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85159719] [2020-10-16 11:42:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:17,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85159719] [2020-10-16 11:42:17,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873125730] [2020-10-16 11:42:17,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:17,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:17,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:17,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:17,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:17,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:17,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043466056] [2020-10-16 11:42:17,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:17,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:17,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:17,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:17,740 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-16 11:42:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:18,248 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-16 11:42:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:18,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:18,250 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:18,250 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:42:18,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:42:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-16 11:42:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 11:42:18,253 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-16 11:42:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:18,253 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 11:42:18,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 11:42:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:18,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:18,254 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:18,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 11:42:18,458 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:18,459 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-16 11:42:18,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:18,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979313542] [2020-10-16 11:42:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:18,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979313542] [2020-10-16 11:42:18,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988103374] [2020-10-16 11:42:18,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:18,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:18,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:18,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:18,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:18,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:18,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:18,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324302338] [2020-10-16 11:42:18,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:18,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:18,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:18,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:18,652 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-16 11:42:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:19,194 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-16 11:42:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:19,195 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:19,196 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:42:19,196 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:42:19,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:42:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-16 11:42:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:42:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 11:42:19,198 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-16 11:42:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:19,198 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 11:42:19,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 11:42:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:19,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:19,199 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:19,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 11:42:19,399 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-16 11:42:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:19,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807463011] [2020-10-16 11:42:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:19,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807463011] [2020-10-16 11:42:19,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381546237] [2020-10-16 11:42:19,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:19,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:19,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:19,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:19,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:19,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:19,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423523140] [2020-10-16 11:42:19,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:19,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:19,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:19,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:19,621 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-16 11:42:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:19,861 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-16 11:42:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:19,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:19,862 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:19,863 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:42:19,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:42:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:42:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-16 11:42:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-16 11:42:19,865 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-16 11:42:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:19,865 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-16 11:42:19,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-16 11:42:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:19,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:19,866 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:20,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:20,067 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:20,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:20,067 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-16 11:42:20,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:20,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623596907] [2020-10-16 11:42:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:20,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623596907] [2020-10-16 11:42:20,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158850577] [2020-10-16 11:42:20,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:20,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:20,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:20,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:20,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:20,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:20,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:20,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:20,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850314417] [2020-10-16 11:42:20,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:20,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:20,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:20,280 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-16 11:42:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:20,543 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-16 11:42:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:20,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:20,544 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:42:20,544 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:42:20,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:42:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-16 11:42:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-16 11:42:20,548 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-16 11:42:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:20,548 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-16 11:42:20,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-16 11:42:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:20,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:20,549 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:20,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:20,759 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:20,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-16 11:42:20,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:20,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681904702] [2020-10-16 11:42:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:20,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681904702] [2020-10-16 11:42:20,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730037486] [2020-10-16 11:42:20,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:20,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:20,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:20,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:20,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:20,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:20,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:20,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60167366] [2020-10-16 11:42:20,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:20,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:20,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:20,956 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-16 11:42:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:21,266 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-16 11:42:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:21,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:21,268 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:42:21,268 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:21,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-16 11:42:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:42:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-16 11:42:21,271 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-16 11:42:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:21,271 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-16 11:42:21,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:21,271 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-16 11:42:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:21,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:21,272 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:21,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:21,473 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:21,473 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-16 11:42:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:21,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108095019] [2020-10-16 11:42:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:21,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108095019] [2020-10-16 11:42:21,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515847191] [2020-10-16 11:42:21,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:21,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:21,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:21,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:21,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:21,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:21,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125590109] [2020-10-16 11:42:21,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:21,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:21,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:21,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:21,734 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-16 11:42:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:22,206 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-16 11:42:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:22,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:22,208 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:22,208 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:22,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-16 11:42:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-16 11:42:22,212 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-16 11:42:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:22,212 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-16 11:42:22,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-16 11:42:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:22,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:22,214 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:22,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:22,423 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:22,424 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-16 11:42:22,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:22,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460753169] [2020-10-16 11:42:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:22,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460753169] [2020-10-16 11:42:22,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860896695] [2020-10-16 11:42:22,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:22,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:22,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:22,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:22,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:22,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135507374] [2020-10-16 11:42:22,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:22,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:22,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:22,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:22,703 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-16 11:42:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:23,189 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 11:42:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:23,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:23,191 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:23,191 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:23,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-16 11:42:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:42:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-16 11:42:23,193 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-16 11:42:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:23,194 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-16 11:42:23,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-16 11:42:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:23,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:23,194 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:23,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 11:42:23,401 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:23,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-16 11:42:23,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:23,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167027501] [2020-10-16 11:42:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167027501] [2020-10-16 11:42:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343458215] [2020-10-16 11:42:23,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:23,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:23,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:23,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:23,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:23,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:23,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395671168] [2020-10-16 11:42:23,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:23,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:23,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:23,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:23,606 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-16 11:42:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:24,034 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-16 11:42:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:24,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:24,036 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:42:24,036 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:42:24,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:42:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-16 11:42:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-16 11:42:24,039 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-16 11:42:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:24,039 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-16 11:42:24,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-16 11:42:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:24,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:24,039 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:24,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:24,240 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-16 11:42:24,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:24,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634025278] [2020-10-16 11:42:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:24,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634025278] [2020-10-16 11:42:24,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008070567] [2020-10-16 11:42:24,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:24,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:24,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:24,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:24,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:24,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:24,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41706570] [2020-10-16 11:42:24,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:24,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:24,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:24,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:24,429 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-16 11:42:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:24,844 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-16 11:42:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:24,844 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:24,845 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:42:24,846 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:42:24,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:42:24,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-16 11:42:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:24,849 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-16 11:42:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:24,849 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:24,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:24,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:24,849 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:25,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 11:42:25,050 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-16 11:42:25,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:25,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659686822] [2020-10-16 11:42:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:25,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659686822] [2020-10-16 11:42:25,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922683389] [2020-10-16 11:42:25,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:25,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:25,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:25,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:25,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:25,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:25,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:25,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854260155] [2020-10-16 11:42:25,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:25,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:25,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:25,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:25,249 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-16 11:42:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:25,810 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 11:42:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:25,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:25,812 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:25,812 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:25,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-16 11:42:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:25,814 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-16 11:42:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:25,815 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:25,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:25,815 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:25,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:25,815 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:26,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:26,024 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:26,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-16 11:42:26,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:26,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269149504] [2020-10-16 11:42:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:26,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269149504] [2020-10-16 11:42:26,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021856744] [2020-10-16 11:42:26,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:26,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:26,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:26,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:26,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:26,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:26,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598627710] [2020-10-16 11:42:26,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:26,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:26,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:26,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:26,281 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-16 11:42:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:26,844 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-16 11:42:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:26,844 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:26,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:26,845 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:42:26,845 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:42:26,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:42:26,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-16 11:42:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:42:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-16 11:42:26,848 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-16 11:42:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:26,848 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-16 11:42:26,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-16 11:42:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:26,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:26,849 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:27,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 11:42:27,058 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:27,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-16 11:42:27,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:27,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464747921] [2020-10-16 11:42:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464747921] [2020-10-16 11:42:27,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264024415] [2020-10-16 11:42:27,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:27,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:27,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:27,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:27,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:27,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954404963] [2020-10-16 11:42:27,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:27,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:27,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:27,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:27,251 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-16 11:42:27,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:27,821 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-16 11:42:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:27,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:27,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:27,823 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:42:27,823 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:42:27,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:42:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-16 11:42:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 11:42:27,826 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-16 11:42:27,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:27,826 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 11:42:27,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 11:42:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:27,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:27,827 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:28,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:28,035 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-16 11:42:28,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:28,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728708761] [2020-10-16 11:42:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:28,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728708761] [2020-10-16 11:42:28,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820796962] [2020-10-16 11:42:28,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:28,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:28,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:28,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:28,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:28,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175573420] [2020-10-16 11:42:28,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:28,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:28,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:28,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:28,206 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-16 11:42:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:28,684 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-16 11:42:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:28,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:28,685 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:42:28,686 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:42:28,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:42:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-16 11:42:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-16 11:42:28,689 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-16 11:42:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:28,689 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-16 11:42:28,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-16 11:42:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:28,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:28,690 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:28,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:28,891 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-16 11:42:28,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:28,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989116923] [2020-10-16 11:42:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989116923] [2020-10-16 11:42:28,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781854452] [2020-10-16 11:42:28,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:29,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:29,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:29,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:29,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:29,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:29,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:29,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936601905] [2020-10-16 11:42:29,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:29,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:29,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:29,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:29,076 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-16 11:42:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:29,670 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-16 11:42:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:29,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:29,672 INFO L225 Difference]: With dead ends: 93 [2020-10-16 11:42:29,672 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:29,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:29,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-16 11:42:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:42:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-16 11:42:29,675 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-16 11:42:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:29,675 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-16 11:42:29,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-16 11:42:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:29,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:29,676 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:29,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:29,876 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:29,877 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-16 11:42:29,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:29,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453240495] [2020-10-16 11:42:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453240495] [2020-10-16 11:42:30,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803239825] [2020-10-16 11:42:30,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:30,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:30,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:30,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:30,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:30,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337559744] [2020-10-16 11:42:30,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:30,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:30,106 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-16 11:42:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:30,388 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-16 11:42:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:30,389 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:30,390 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:30,390 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:30,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-16 11:42:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:30,393 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:30,393 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:30,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:30,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:30,394 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:30,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:30,604 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:30,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:30,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-16 11:42:30,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:30,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867653981] [2020-10-16 11:42:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867653981] [2020-10-16 11:42:30,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863365253] [2020-10-16 11:42:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:30,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:30,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:30,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:30,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:30,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:30,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:30,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595097024] [2020-10-16 11:42:30,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:30,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:30,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:30,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:30,836 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:31,165 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-16 11:42:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:31,166 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:31,167 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:31,167 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:42:31,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:42:31,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-16 11:42:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:31,170 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:31,170 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:31,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:31,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:31,171 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:31,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:31,379 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:31,380 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-16 11:42:31,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:31,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749608615] [2020-10-16 11:42:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:31,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749608615] [2020-10-16 11:42:31,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083685443] [2020-10-16 11:42:31,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:31,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:31,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:31,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:31,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:31,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:31,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:31,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973186340] [2020-10-16 11:42:31,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:31,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:31,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:31,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:31,575 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:31,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:31,914 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-16 11:42:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:31,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:31,915 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:42:31,915 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:42:31,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:42:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-16 11:42:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:31,918 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:31,918 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:31,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:31,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:31,919 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:32,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:32,120 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-16 11:42:32,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:32,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559797235] [2020-10-16 11:42:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:32,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559797235] [2020-10-16 11:42:32,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706630980] [2020-10-16 11:42:32,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:32,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:32,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:32,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:32,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:32,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:32,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:32,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:32,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487686839] [2020-10-16 11:42:32,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:32,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:32,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:32,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:32,364 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:32,811 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-16 11:42:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:32,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:32,812 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:42:32,812 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:42:32,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:42:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-16 11:42:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:32,816 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:32,817 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:32,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:32,817 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:32,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:32,818 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:33,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:33,024 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:33,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-16 11:42:33,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:33,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213019147] [2020-10-16 11:42:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213019147] [2020-10-16 11:42:33,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250536977] [2020-10-16 11:42:33,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:33,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:33,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:33,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850900342] [2020-10-16 11:42:33,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:33,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:33,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:33,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:33,227 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:33,631 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-16 11:42:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:33,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:33,632 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:33,633 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:33,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-16 11:42:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:33,636 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:33,636 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:33,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:33,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:33,637 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:33,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 11:42:33,837 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:33,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:33,838 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-16 11:42:33,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:33,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650349234] [2020-10-16 11:42:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:33,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650349234] [2020-10-16 11:42:33,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145761438] [2020-10-16 11:42:33,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:34,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:34,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:34,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:34,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:34,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:34,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969463426] [2020-10-16 11:42:34,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:34,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:34,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:34,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:34,062 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:34,592 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-16 11:42:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:34,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:34,594 INFO L225 Difference]: With dead ends: 93 [2020-10-16 11:42:34,594 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:42:34,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:42:34,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-16 11:42:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:34,597 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:34,597 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:34,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:34,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:34,598 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:34,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:34,800 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:34,800 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-16 11:42:34,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:34,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615705133] [2020-10-16 11:42:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:34,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615705133] [2020-10-16 11:42:34,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859310671] [2020-10-16 11:42:34,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:34,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:34,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:34,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:35,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:35,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:35,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762992032] [2020-10-16 11:42:35,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:35,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:35,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:35,006 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:35,452 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-16 11:42:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:35,452 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:35,454 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:42:35,454 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:42:35,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:42:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-16 11:42:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:35,458 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:35,458 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:35,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:35,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:35,458 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:35,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 11:42:35,659 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-16 11:42:35,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:35,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730247443] [2020-10-16 11:42:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:35,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730247443] [2020-10-16 11:42:35,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527706464] [2020-10-16 11:42:35,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:35,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:35,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:35,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:35,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:35,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:35,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:35,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014875711] [2020-10-16 11:42:35,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:35,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:35,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:35,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:35,879 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:36,480 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 11:42:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:36,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:36,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:36,482 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:36,482 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:36,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-16 11:42:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:36,485 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:36,485 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:36,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:36,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:36,486 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:36,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:36,693 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:36,694 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-16 11:42:36,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:36,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342671962] [2020-10-16 11:42:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:36,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342671962] [2020-10-16 11:42:36,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241236314] [2020-10-16 11:42:36,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:36,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:36,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:36,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:36,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061849985] [2020-10-16 11:42:36,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:36,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:36,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:36,880 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:37,382 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-16 11:42:37,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:37,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:37,384 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:42:37,384 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:42:37,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:42:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-16 11:42:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:37,387 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:37,387 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:37,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:37,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:37,388 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:37,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:37,588 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:37,589 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-16 11:42:37,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:37,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491810183] [2020-10-16 11:42:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:37,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491810183] [2020-10-16 11:42:37,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914808737] [2020-10-16 11:42:37,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:37,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:37,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:37,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:37,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:37,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:37,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:37,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853486145] [2020-10-16 11:42:37,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:37,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:37,849 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:38,530 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-16 11:42:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:38,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:38,532 INFO L225 Difference]: With dead ends: 85 [2020-10-16 11:42:38,532 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:42:38,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:42:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:42:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-16 11:42:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:38,535 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:38,535 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:38,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:38,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:38,536 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:38,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:38,745 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-16 11:42:38,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:38,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594818665] [2020-10-16 11:42:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:38,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594818665] [2020-10-16 11:42:38,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575360086] [2020-10-16 11:42:38,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:38,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:38,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:38,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:38,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:38,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837398587] [2020-10-16 11:42:38,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:38,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:38,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:38,934 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:39,468 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 11:42:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:39,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:39,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:39,470 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:39,470 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:42:39,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:42:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-16 11:42:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:42:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-16 11:42:39,474 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-16 11:42:39,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:39,474 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-16 11:42:39,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-16 11:42:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:39,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:39,475 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:39,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:39,677 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-16 11:42:39,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:39,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384991296] [2020-10-16 11:42:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:39,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384991296] [2020-10-16 11:42:39,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800183848] [2020-10-16 11:42:39,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:39,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:39,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:39,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:39,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:39,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:39,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:39,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484599405] [2020-10-16 11:42:39,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:39,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:39,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:39,886 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-16 11:42:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:40,610 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-16 11:42:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:42:40,611 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:40,612 INFO L225 Difference]: With dead ends: 82 [2020-10-16 11:42:40,612 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 11:42:40,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:42:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 11:42:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-16 11:42:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:42:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-16 11:42:40,614 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-16 11:42:40,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:40,615 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-16 11:42:40,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-16 11:42:40,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:40,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:40,615 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:40,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:40,823 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:40,824 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-16 11:42:40,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:40,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054613481] [2020-10-16 11:42:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:40,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054613481] [2020-10-16 11:42:40,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722313160] [2020-10-16 11:42:40,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:40,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:40,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:40,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:41,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:41,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:41,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:41,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693461900] [2020-10-16 11:42:41,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:41,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:41,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:41,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:41,019 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-16 11:42:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:41,682 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 11:42:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:41,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:41,684 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:42:41,684 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:42:41,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:42:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:42:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-16 11:42:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 11:42:41,686 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-16 11:42:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:41,686 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 11:42:41,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 11:42:41,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:41,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:41,688 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:41,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:41,889 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:41,889 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-16 11:42:41,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:41,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986129632] [2020-10-16 11:42:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986129632] [2020-10-16 11:42:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147299513] [2020-10-16 11:42:42,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:42,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:42,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:42,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:42,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:42,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:42,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:42,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:42,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721753087] [2020-10-16 11:42:42,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:42,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:42,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:42,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:42,108 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-16 11:42:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:42,828 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-16 11:42:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:42,829 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:42,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:42,830 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:42,830 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:42:42,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:42:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:42:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-16 11:42:42,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 11:42:42,834 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-16 11:42:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:42,834 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 11:42:42,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 11:42:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:42,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:42,835 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:43,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 11:42:43,044 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-16 11:42:43,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:43,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172635999] [2020-10-16 11:42:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:43,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172635999] [2020-10-16 11:42:43,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312420561] [2020-10-16 11:42:43,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:43,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:43,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:43,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:43,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:43,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736213450] [2020-10-16 11:42:43,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:43,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:43,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:43,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:43,266 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-16 11:42:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:43,574 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 11:42:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:43,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:43,576 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:43,576 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:43,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-16 11:42:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-16 11:42:43,579 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-16 11:42:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:43,579 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-16 11:42:43,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-16 11:42:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:43,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:43,580 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:43,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:43,784 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:43,784 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-16 11:42:43,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:43,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861081811] [2020-10-16 11:42:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:43,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861081811] [2020-10-16 11:42:43,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54746848] [2020-10-16 11:42:43,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:44,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:44,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:44,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:44,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:44,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:44,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:44,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:44,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878497605] [2020-10-16 11:42:44,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:44,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:44,052 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-16 11:42:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:44,408 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-16 11:42:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:44,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:44,409 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:42:44,409 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:42:44,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:42:44,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-16 11:42:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-16 11:42:44,412 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-16 11:42:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:44,413 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-16 11:42:44,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-16 11:42:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:44,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:44,413 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:44,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 11:42:44,622 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:44,622 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-16 11:42:44,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:44,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069569565] [2020-10-16 11:42:44,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069569565] [2020-10-16 11:42:44,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192589021] [2020-10-16 11:42:44,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:44,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:44,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:44,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:44,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824103431] [2020-10-16 11:42:44,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:44,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:44,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:44,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:44,861 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-16 11:42:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:45,256 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 11:42:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:45,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:45,258 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:45,258 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:45,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-16 11:42:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-16 11:42:45,261 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-16 11:42:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:45,261 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-16 11:42:45,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-16 11:42:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:45,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:45,262 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:45,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:45,463 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-16 11:42:45,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:45,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621360952] [2020-10-16 11:42:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:45,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621360952] [2020-10-16 11:42:45,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140099380] [2020-10-16 11:42:45,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:45,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:45,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:45,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:45,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:45,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:45,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:45,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:45,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851069619] [2020-10-16 11:42:45,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:45,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:45,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:45,724 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-16 11:42:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:46,154 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-16 11:42:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:46,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:46,156 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:42:46,156 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:42:46,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:42:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-16 11:42:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-16 11:42:46,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-16 11:42:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:46,160 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-16 11:42:46,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-16 11:42:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:46,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:46,161 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:46,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:46,371 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:46,371 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-16 11:42:46,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:46,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464577518] [2020-10-16 11:42:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:46,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464577518] [2020-10-16 11:42:46,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997041778] [2020-10-16 11:42:46,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:46,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:46,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:46,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:46,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:46,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:46,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384141665] [2020-10-16 11:42:46,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:46,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:46,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:46,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:46,598 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-16 11:42:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:47,011 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-16 11:42:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:47,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:47,013 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:42:47,013 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:42:47,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:42:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-16 11:42:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:42:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-16 11:42:47,017 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-16 11:42:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:47,017 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-16 11:42:47,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-16 11:42:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:47,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:47,018 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:47,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 11:42:47,222 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-16 11:42:47,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:47,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194346945] [2020-10-16 11:42:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:47,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194346945] [2020-10-16 11:42:47,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267339783] [2020-10-16 11:42:47,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:47,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:47,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:47,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:47,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:47,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:47,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:47,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756751596] [2020-10-16 11:42:47,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:47,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:47,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:47,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:47,470 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-16 11:42:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:47,985 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-16 11:42:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:47,986 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:47,987 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:42:47,987 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:42:47,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:42:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 11:42:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-16 11:42:47,990 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-16 11:42:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:47,990 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-16 11:42:47,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-16 11:42:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:47,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:47,991 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:48,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 11:42:48,200 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:48,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-16 11:42:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:48,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634836666] [2020-10-16 11:42:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:48,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634836666] [2020-10-16 11:42:48,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334565281] [2020-10-16 11:42:48,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:48,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:48,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:48,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:48,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:48,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837673053] [2020-10-16 11:42:48,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:48,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:48,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:48,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:48,421 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-16 11:42:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:48,909 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-16 11:42:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:48,910 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:48,911 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:42:48,911 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:42:48,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:42:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 11:42:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:42:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-16 11:42:48,913 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-16 11:42:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:48,914 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-16 11:42:48,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:48,914 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-16 11:42:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:48,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:48,914 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:49,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:49,117 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-16 11:42:49,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:49,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105099278] [2020-10-16 11:42:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:49,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105099278] [2020-10-16 11:42:49,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693799997] [2020-10-16 11:42:49,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:49,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:49,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:49,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:49,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:49,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:49,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681579851] [2020-10-16 11:42:49,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:49,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:49,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:49,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:49,365 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-16 11:42:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:49,962 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-16 11:42:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:49,962 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:49,963 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:49,964 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:49,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:49,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-16 11:42:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:42:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-16 11:42:49,967 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-16 11:42:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:49,967 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-16 11:42:49,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-16 11:42:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:49,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:49,968 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:50,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 11:42:50,176 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:50,177 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-16 11:42:50,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:50,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264965414] [2020-10-16 11:42:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:50,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264965414] [2020-10-16 11:42:50,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176974250] [2020-10-16 11:42:50,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:50,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:50,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:50,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210051825] [2020-10-16 11:42:50,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:50,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:50,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:50,493 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-16 11:42:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:51,087 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-16 11:42:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:51,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:51,089 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:42:51,089 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 11:42:51,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:42:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 11:42:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-16 11:42:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:51,098 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-16 11:42:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:51,098 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:51,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:51,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:51,099 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:51,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:51,307 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-16 11:42:51,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:51,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117486132] [2020-10-16 11:42:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:51,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117486132] [2020-10-16 11:42:51,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376325854] [2020-10-16 11:42:51,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:51,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:51,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:51,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:51,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:51,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:51,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:51,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863403358] [2020-10-16 11:42:51,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:51,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:51,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:51,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:51,627 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-16 11:42:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:52,319 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-16 11:42:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:52,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:52,321 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:42:52,321 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:42:52,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:42:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:42:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-16 11:42:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:52,324 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-16 11:42:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:52,324 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:52,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:52,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:52,324 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:52,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 11:42:52,525 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-16 11:42:52,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:52,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167000083] [2020-10-16 11:42:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167000083] [2020-10-16 11:42:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665089126] [2020-10-16 11:42:52,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:52,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:52,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:52,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:52,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:52,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893853424] [2020-10-16 11:42:52,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:52,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:52,740 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-16 11:42:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:53,326 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-16 11:42:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:42:53,326 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:53,327 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:42:53,327 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:42:53,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:42:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:42:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-16 11:42:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:42:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-16 11:42:53,331 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-16 11:42:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:53,331 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-16 11:42:53,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-16 11:42:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:53,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:53,331 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:53,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:53,532 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:53,533 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-16 11:42:53,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:53,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764295313] [2020-10-16 11:42:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:53,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764295313] [2020-10-16 11:42:53,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276697003] [2020-10-16 11:42:53,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:53,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:53,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:53,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:53,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:53,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:53,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:53,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480371024] [2020-10-16 11:42:53,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:53,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:53,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:53,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:53,770 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-16 11:42:54,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:54,508 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-16 11:42:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:42:54,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:54,510 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:42:54,510 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 11:42:54,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:42:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 11:42:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-16 11:42:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 11:42:54,512 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-16 11:42:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:54,512 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 11:42:54,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:54,512 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 11:42:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:54,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:54,513 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:54,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 11:42:54,720 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-16 11:42:54,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:54,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262429655] [2020-10-16 11:42:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:54,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262429655] [2020-10-16 11:42:54,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755057884] [2020-10-16 11:42:54,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:54,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:54,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:54,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:54,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:54,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278020205] [2020-10-16 11:42:54,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:54,989 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-16 11:42:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:55,690 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 11:42:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:42:55,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:55,691 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:42:55,691 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:42:55,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:42:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:42:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-16 11:42:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:42:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-16 11:42:55,695 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-16 11:42:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:55,696 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-16 11:42:55,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-16 11:42:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:55,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:55,700 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:55,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 11:42:55,910 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:55,911 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-16 11:42:55,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:55,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290539430] [2020-10-16 11:42:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:56,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290539430] [2020-10-16 11:42:56,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264129220] [2020-10-16 11:42:56,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:56,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:56,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:56,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:56,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:56,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:56,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:56,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771243629] [2020-10-16 11:42:56,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:56,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:56,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:56,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:56,243 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-16 11:42:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:57,193 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-16 11:42:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:42:57,194 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:57,195 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:57,195 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:57,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:42:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-16 11:42:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:42:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-16 11:42:57,199 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-16 11:42:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:57,199 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-16 11:42:57,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-16 11:42:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:57,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:57,200 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:57,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:57,408 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-16 11:42:57,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:57,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540109935] [2020-10-16 11:42:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:57,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540109935] [2020-10-16 11:42:57,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248671876] [2020-10-16 11:42:57,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:57,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:57,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:42:57,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016229102] [2020-10-16 11:42:57,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:57,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:57,677 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-16 11:42:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:58,057 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-16 11:42:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:58,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:42:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:58,059 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:42:58,061 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:42:58,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:42:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-16 11:42:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:42:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:42:58,063 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:42:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:58,063 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:42:58,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:42:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:58,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:58,064 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:58,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:58,267 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-16 11:42:58,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:58,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378058804] [2020-10-16 11:42:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:58,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378058804] [2020-10-16 11:42:58,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423038315] [2020-10-16 11:42:58,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:58,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:58,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:58,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:58,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:58,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:42:58,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387136753] [2020-10-16 11:42:58,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:42:58,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:58,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:42:58,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:42:58,562 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:42:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:59,018 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-16 11:42:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:59,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:42:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:59,019 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:42:59,019 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:42:59,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:42:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-16 11:42:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:42:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:42:59,022 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:42:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:59,023 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:42:59,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:42:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:42:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:59,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:59,023 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:59,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 11:42:59,224 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-16 11:42:59,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:59,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008709586] [2020-10-16 11:42:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:59,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008709586] [2020-10-16 11:42:59,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852315597] [2020-10-16 11:42:59,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:59,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:59,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:59,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:59,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:59,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:59,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:42:59,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332442620] [2020-10-16 11:42:59,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:59,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:59,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:59,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:59,499 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:42:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:59,921 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 11:42:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:59,922 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:42:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:59,923 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:42:59,923 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:42:59,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:42:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-16 11:42:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:42:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:42:59,926 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:42:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:59,926 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:42:59,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:42:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:59,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:59,928 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:00,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:00,136 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-16 11:43:00,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:00,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399235001] [2020-10-16 11:43:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:00,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399235001] [2020-10-16 11:43:00,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708546097] [2020-10-16 11:43:00,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:00,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:00,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:00,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:00,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:00,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:00,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:00,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:00,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647554128] [2020-10-16 11:43:00,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:00,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:00,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:00,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:00,423 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:00,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:00,977 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-16 11:43:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:00,978 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:00,978 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:00,979 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:00,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:43:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-16 11:43:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:00,982 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:00,982 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:00,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:00,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:00,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:00,983 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:01,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 11:43:01,189 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:01,189 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-16 11:43:01,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:01,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052997114] [2020-10-16 11:43:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:01,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052997114] [2020-10-16 11:43:01,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068623751] [2020-10-16 11:43:01,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:01,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:43:01,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:01,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:01,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:01,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771355817] [2020-10-16 11:43:01,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:01,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:01,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:01,438 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:01,916 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 11:43:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:01,917 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:01,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:01,918 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:43:01,918 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:43:01,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:43:01,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:43:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-16 11:43:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:01,920 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:01,920 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:01,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:01,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:01,921 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:02,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 11:43:02,123 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:02,123 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-16 11:43:02,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:02,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562301943] [2020-10-16 11:43:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:02,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562301943] [2020-10-16 11:43:02,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276754119] [2020-10-16 11:43:02,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:02,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:43:02,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:02,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:02,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:02,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:02,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:02,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000412225] [2020-10-16 11:43:02,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:02,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:02,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:02,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:02,406 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:03,031 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-16 11:43:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:03,032 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:03,033 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:43:03,033 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:43:03,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:43:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:43:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-16 11:43:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:03,036 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:03,036 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:03,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:03,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:03,037 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:03,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 11:43:03,242 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:03,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-16 11:43:03,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:03,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408277164] [2020-10-16 11:43:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:03,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408277164] [2020-10-16 11:43:03,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313969905] [2020-10-16 11:43:03,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:03,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:03,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:03,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:03,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859662928] [2020-10-16 11:43:03,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:03,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:03,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:03,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:03,488 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:04,027 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-16 11:43:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:04,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:04,028 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:43:04,029 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 11:43:04,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:43:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 11:43:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-16 11:43:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:04,031 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:04,032 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:04,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:04,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:04,032 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:04,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:04,236 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-16 11:43:04,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:04,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22737186] [2020-10-16 11:43:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:04,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22737186] [2020-10-16 11:43:04,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715699488] [2020-10-16 11:43:04,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:04,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:04,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:04,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:04,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:04,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:04,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:04,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:04,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583338622] [2020-10-16 11:43:04,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:04,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:04,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:04,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:04,501 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:05,209 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 11:43:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:05,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:05,211 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:43:05,212 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:43:05,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:43:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-16 11:43:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:05,215 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:05,215 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:05,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:05,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:05,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:05,216 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:05,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 11:43:05,425 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-16 11:43:05,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:05,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017360885] [2020-10-16 11:43:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017360885] [2020-10-16 11:43:05,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121471367] [2020-10-16 11:43:05,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:05,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:05,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:05,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:05,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:05,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:05,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755236745] [2020-10-16 11:43:05,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:05,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:05,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:05,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:05,651 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:06,252 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-16 11:43:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:06,253 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:06,254 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:43:06,254 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:43:06,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:43:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-16 11:43:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:06,257 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:06,258 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:06,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:06,258 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:06,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:06,258 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:06,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:06,462 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-16 11:43:06,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:06,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146880658] [2020-10-16 11:43:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:06,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146880658] [2020-10-16 11:43:06,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518780935] [2020-10-16 11:43:06,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:06,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:06,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:06,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:06,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:06,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:06,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:06,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58937242] [2020-10-16 11:43:06,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:06,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:06,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:06,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:06,709 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:07,510 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 11:43:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:07,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:07,511 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:43:07,511 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:43:07,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:43:07,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-16 11:43:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:07,514 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:07,515 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:07,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:07,515 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:07,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:07,515 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:07,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:07,724 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:07,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-16 11:43:07,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:07,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647931789] [2020-10-16 11:43:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:07,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647931789] [2020-10-16 11:43:07,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174916444] [2020-10-16 11:43:07,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:07,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:43:07,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:07,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:08,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:08,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:08,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778311163] [2020-10-16 11:43:08,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:08,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:08,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:08,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:08,024 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:08,652 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 11:43:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:08,653 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:08,653 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:43:08,654 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:43:08,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:43:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-16 11:43:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:08,657 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:08,658 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:08,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:08,658 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:08,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:08,660 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:08,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:08,865 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-16 11:43:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:08,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90304347] [2020-10-16 11:43:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:09,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90304347] [2020-10-16 11:43:09,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825393103] [2020-10-16 11:43:09,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:09,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:43:09,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:09,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:09,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:09,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:09,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:09,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570110407] [2020-10-16 11:43:09,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:09,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:09,124 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:10,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:10,013 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-16 11:43:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:10,014 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:10,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:10,015 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:43:10,015 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:43:10,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:10,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:43:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-16 11:43:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:10,017 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:10,018 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:10,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:10,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:10,018 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:10,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:10,219 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-16 11:43:10,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:10,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129370071] [2020-10-16 11:43:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:10,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129370071] [2020-10-16 11:43:10,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898409266] [2020-10-16 11:43:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:10,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:10,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:10,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375279408] [2020-10-16 11:43:10,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:10,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:10,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:10,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:10,516 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:11,262 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 11:43:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:11,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:11,263 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:11,264 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:11,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:11,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-16 11:43:11,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:43:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-16 11:43:11,267 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-16 11:43:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:11,267 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-16 11:43:11,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-16 11:43:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:11,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:11,268 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:11,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 11:43:11,470 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-16 11:43:11,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:11,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277609781] [2020-10-16 11:43:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:11,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277609781] [2020-10-16 11:43:11,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610326595] [2020-10-16 11:43:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:11,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:11,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:11,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:11,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:11,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:11,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:11,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132820865] [2020-10-16 11:43:11,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:11,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:11,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:11,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:11,705 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-16 11:43:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:12,616 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-16 11:43:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:12,617 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:12,617 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:43:12,617 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:43:12,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:43:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-16 11:43:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:43:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-16 11:43:12,620 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-16 11:43:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:12,620 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-16 11:43:12,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-16 11:43:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:12,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:12,621 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:12,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 11:43:12,821 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-16 11:43:12,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:12,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383238080] [2020-10-16 11:43:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:12,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383238080] [2020-10-16 11:43:12,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491975643] [2020-10-16 11:43:12,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:13,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:13,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:13,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:13,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:13,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:13,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:13,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:13,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651052238] [2020-10-16 11:43:13,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:13,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:13,077 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-16 11:43:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:13,937 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-16 11:43:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:13,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:13,938 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:43:13,938 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:43:13,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:43:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-16 11:43:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 11:43:13,940 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-16 11:43:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:13,941 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 11:43:13,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 11:43:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:13,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:13,941 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:14,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 11:43:14,142 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:14,143 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-16 11:43:14,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:14,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303684872] [2020-10-16 11:43:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:14,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303684872] [2020-10-16 11:43:14,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122796882] [2020-10-16 11:43:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:14,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:14,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:14,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:14,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:14,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:14,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:14,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219712586] [2020-10-16 11:43:14,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:14,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:14,411 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-16 11:43:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:15,342 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-16 11:43:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:15,343 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:15,344 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:43:15,344 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:43:15,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:43:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:43:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-16 11:43:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:43:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 11:43:15,347 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-16 11:43:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:15,347 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 11:43:15,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 11:43:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:15,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:15,348 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:15,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 11:43:15,548 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:15,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:15,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-16 11:43:15,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:15,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390013654] [2020-10-16 11:43:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:15,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390013654] [2020-10-16 11:43:15,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090183833] [2020-10-16 11:43:15,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:15,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:15,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:15,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:15,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:15,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:15,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:15,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403344693] [2020-10-16 11:43:15,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:15,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:15,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:15,847 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-16 11:43:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:16,221 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-16 11:43:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:43:16,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:16,223 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:43:16,223 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:43:16,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:43:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:43:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-16 11:43:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:43:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-16 11:43:16,225 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-16 11:43:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:16,225 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-16 11:43:16,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-16 11:43:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:16,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:16,226 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:16,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:16,429 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:16,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-16 11:43:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:16,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136453446] [2020-10-16 11:43:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:16,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136453446] [2020-10-16 11:43:16,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051561814] [2020-10-16 11:43:16,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:16,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:16,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:16,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:16,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:16,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:16,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:16,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920009599] [2020-10-16 11:43:16,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:16,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:16,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:16,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:16,762 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-16 11:43:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:17,214 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-16 11:43:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:43:17,215 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:17,216 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:43:17,216 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:43:17,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:43:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:43:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 11:43:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:43:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-16 11:43:17,219 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-16 11:43:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:17,220 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-16 11:43:17,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-16 11:43:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:17,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:17,220 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:17,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 11:43:17,424 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:17,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-16 11:43:17,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:17,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323226479] [2020-10-16 11:43:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:17,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323226479] [2020-10-16 11:43:17,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587644974] [2020-10-16 11:43:17,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:17,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:17,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:17,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344866607] [2020-10-16 11:43:17,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:17,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:17,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:17,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:17,723 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-16 11:43:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:18,209 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-16 11:43:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:18,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:18,211 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:18,211 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:18,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:43:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 11:43:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:43:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-16 11:43:18,214 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-16 11:43:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:18,214 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-16 11:43:18,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-16 11:43:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:18,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:18,215 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:18,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 11:43:18,416 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:18,416 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-16 11:43:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:18,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997635230] [2020-10-16 11:43:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:18,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997635230] [2020-10-16 11:43:18,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127050350] [2020-10-16 11:43:18,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:18,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:18,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:18,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:18,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:18,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:18,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:18,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595712955] [2020-10-16 11:43:18,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:18,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:18,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:18,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:18,737 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-16 11:43:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:19,234 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-16 11:43:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:19,234 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:19,235 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:43:19,235 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:43:19,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:43:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:43:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-16 11:43:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:43:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-16 11:43:19,237 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-16 11:43:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:19,237 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-16 11:43:19,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-16 11:43:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:19,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:19,237 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:19,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 11:43:19,438 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:19,439 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-16 11:43:19,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:19,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286421528] [2020-10-16 11:43:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:19,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286421528] [2020-10-16 11:43:19,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579675040] [2020-10-16 11:43:19,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:19,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:19,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:19,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:19,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:19,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:19,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:19,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378859028] [2020-10-16 11:43:19,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:19,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:19,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:19,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:19,737 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-16 11:43:20,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:20,271 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-16 11:43:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:20,271 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:20,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:20,272 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:43:20,272 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:43:20,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:43:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:43:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-16 11:43:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:43:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-16 11:43:20,274 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-16 11:43:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:20,275 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-16 11:43:20,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-16 11:43:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:20,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:20,276 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:20,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:20,484 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:20,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-16 11:43:20,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:20,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822021373] [2020-10-16 11:43:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:20,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822021373] [2020-10-16 11:43:20,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863412351] [2020-10-16 11:43:20,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:20,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:20,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:20,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:20,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:20,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:20,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:20,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:20,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023808088] [2020-10-16 11:43:20,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:20,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:20,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:20,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:20,789 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-16 11:43:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:21,416 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-16 11:43:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:21,417 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:21,417 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:43:21,418 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:43:21,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:43:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-16 11:43:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:43:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-16 11:43:21,420 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-16 11:43:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:21,421 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-16 11:43:21,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-16 11:43:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:21,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:21,421 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:21,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:21,622 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:21,623 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-16 11:43:21,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:21,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151648070] [2020-10-16 11:43:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:21,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151648070] [2020-10-16 11:43:21,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788782868] [2020-10-16 11:43:21,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:21,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:21,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:21,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:21,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:21,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:21,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635547746] [2020-10-16 11:43:21,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:21,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:21,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:21,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:21,949 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-16 11:43:22,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:22,522 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-16 11:43:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:22,523 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:22,523 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:43:22,523 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:43:22,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:43:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-16 11:43:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:43:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-16 11:43:22,525 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-16 11:43:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:22,526 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-16 11:43:22,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-16 11:43:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:22,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:22,526 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:22,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:22,727 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:22,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-16 11:43:22,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:22,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624124819] [2020-10-16 11:43:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:22,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624124819] [2020-10-16 11:43:22,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311117983] [2020-10-16 11:43:22,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:22,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:22,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:22,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:22,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:23,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:23,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:23,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:23,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51317041] [2020-10-16 11:43:23,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:23,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:23,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:23,032 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-16 11:43:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:23,714 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-16 11:43:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:23,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:23,715 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:23,715 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:23,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-16 11:43:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:43:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-16 11:43:23,718 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-16 11:43:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:23,718 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-16 11:43:23,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-16 11:43:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:23,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:23,719 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:23,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 11:43:23,923 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-16 11:43:23,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:23,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201487420] [2020-10-16 11:43:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:24,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201487420] [2020-10-16 11:43:24,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986128393] [2020-10-16 11:43:24,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:24,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:24,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:24,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:24,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:24,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465829101] [2020-10-16 11:43:24,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:24,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:24,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:24,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:24,189 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-16 11:43:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:24,835 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-16 11:43:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:24,836 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:24,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:24,837 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:43:24,837 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:43:24,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:43:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-16 11:43:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:43:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-16 11:43:24,839 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-16 11:43:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:24,840 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-16 11:43:24,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-16 11:43:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:24,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:24,840 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:25,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:25,041 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:25,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:25,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-16 11:43:25,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:25,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979575789] [2020-10-16 11:43:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:25,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979575789] [2020-10-16 11:43:25,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799691079] [2020-10-16 11:43:25,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:25,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:25,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:25,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:25,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:25,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:25,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919721499] [2020-10-16 11:43:25,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:25,327 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-16 11:43:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:26,125 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-16 11:43:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:26,126 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:26,126 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:43:26,126 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:43:26,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:43:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-16 11:43:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:43:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-16 11:43:26,129 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-16 11:43:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:26,130 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-16 11:43:26,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-16 11:43:26,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:26,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:26,130 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:26,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 11:43:26,331 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-16 11:43:26,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:26,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994379869] [2020-10-16 11:43:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:26,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994379869] [2020-10-16 11:43:26,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842601912] [2020-10-16 11:43:26,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:26,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:26,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:26,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:26,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:26,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:26,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:26,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800378475] [2020-10-16 11:43:26,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:26,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:26,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:26,592 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-16 11:43:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:27,291 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-16 11:43:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:27,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:27,292 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:27,292 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:27,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-16 11:43:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:27,295 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-16 11:43:27,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:27,296 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:27,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:27,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:27,296 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:27,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 11:43:27,503 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:27,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:27,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-16 11:43:27,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:27,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589718181] [2020-10-16 11:43:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:27,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589718181] [2020-10-16 11:43:27,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259459948] [2020-10-16 11:43:27,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:27,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:27,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:27,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:27,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:27,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:27,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:27,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086284775] [2020-10-16 11:43:27,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:27,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:27,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:27,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:27,780 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-16 11:43:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:28,649 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-16 11:43:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:28,650 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:28,651 INFO L225 Difference]: With dead ends: 110 [2020-10-16 11:43:28,651 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:43:28,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:43:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:43:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-16 11:43:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:28,653 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-16 11:43:28,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:28,653 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:28,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:28,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:28,654 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:28,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 11:43:28,855 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:28,855 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-16 11:43:28,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:28,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503546842] [2020-10-16 11:43:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:29,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503546842] [2020-10-16 11:43:29,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728684373] [2020-10-16 11:43:29,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:29,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:29,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:29,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:29,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:29,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:29,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252367187] [2020-10-16 11:43:29,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:29,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:29,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:29,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:29,116 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-16 11:43:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:29,878 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-16 11:43:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:43:29,879 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:29,879 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:43:29,879 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:43:29,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:29,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:43:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-16 11:43:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:43:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-16 11:43:29,882 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-16 11:43:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:29,882 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-16 11:43:29,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-16 11:43:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:29,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:29,883 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:30,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:30,084 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:30,084 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-16 11:43:30,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:30,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548090314] [2020-10-16 11:43:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:30,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548090314] [2020-10-16 11:43:30,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341449203] [2020-10-16 11:43:30,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:30,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:30,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:30,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:30,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:30,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:30,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173431683] [2020-10-16 11:43:30,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:30,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:30,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:30,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:30,373 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-16 11:43:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:31,377 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-16 11:43:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:31,378 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:31,379 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:43:31,379 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:43:31,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:43:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:43:31,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-16 11:43:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 11:43:31,381 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-16 11:43:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:31,382 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 11:43:31,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 11:43:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:31,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:31,382 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:31,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 11:43:31,583 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-16 11:43:31,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:31,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920276675] [2020-10-16 11:43:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:31,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920276675] [2020-10-16 11:43:31,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212539077] [2020-10-16 11:43:31,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:31,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:31,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:31,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841985083] [2020-10-16 11:43:31,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:31,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:31,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:31,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:31,839 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-16 11:43:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:32,643 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-16 11:43:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:32,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:32,645 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:43:32,645 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:43:32,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:43:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:43:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-16 11:43:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:43:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-16 11:43:32,648 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-16 11:43:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:32,648 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-16 11:43:32,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-16 11:43:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:32,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:32,648 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:32,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:32,849 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:32,850 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-16 11:43:32,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:32,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41673706] [2020-10-16 11:43:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:33,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41673706] [2020-10-16 11:43:33,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477579222] [2020-10-16 11:43:33,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:33,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:33,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:33,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:33,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:33,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:33,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613797159] [2020-10-16 11:43:33,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:33,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:33,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:33,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:33,126 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-16 11:43:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:34,092 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-16 11:43:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:43:34,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:34,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:34,093 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:43:34,093 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:34,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:43:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:34,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-16 11:43:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:43:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-16 11:43:34,096 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-16 11:43:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:34,096 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-16 11:43:34,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-16 11:43:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:34,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:34,097 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:34,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:34,305 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:34,305 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-16 11:43:34,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:34,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881611097] [2020-10-16 11:43:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:34,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881611097] [2020-10-16 11:43:34,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983521865] [2020-10-16 11:43:34,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:34,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:34,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:34,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:34,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:34,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799740917] [2020-10-16 11:43:34,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:34,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:34,629 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-16 11:43:35,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:35,098 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-16 11:43:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:43:35,099 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:35,099 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:43:35,099 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:43:35,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:43:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:43:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-16 11:43:35,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:35,102 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:35,103 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:35,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:35,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:35,104 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:35,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:35,312 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:35,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:35,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-16 11:43:35,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:35,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231382263] [2020-10-16 11:43:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:35,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231382263] [2020-10-16 11:43:35,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632799725] [2020-10-16 11:43:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:35,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:35,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:35,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:35,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:35,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:35,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:35,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:35,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876854114] [2020-10-16 11:43:35,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:35,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:35,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:35,666 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:36,227 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 11:43:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:36,228 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:36,229 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:43:36,229 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:43:36,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:43:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:43:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-16 11:43:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:36,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:36,232 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:36,232 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:36,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:36,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:36,233 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:36,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:36,433 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:36,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-16 11:43:36,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:36,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47808321] [2020-10-16 11:43:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:36,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47808321] [2020-10-16 11:43:36,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755023732] [2020-10-16 11:43:36,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:36,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:36,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:36,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:36,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:36,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:36,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:36,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711248176] [2020-10-16 11:43:36,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:36,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:36,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:36,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:36,759 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:37,281 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 11:43:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:37,282 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:37,283 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:43:37,283 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:43:37,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:43:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:43:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-16 11:43:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:37,286 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:37,286 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:37,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:37,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:37,286 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:37,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:37,487 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:37,488 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-16 11:43:37,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:37,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426373314] [2020-10-16 11:43:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:37,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426373314] [2020-10-16 11:43:37,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367108605] [2020-10-16 11:43:37,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:37,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:37,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:37,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:37,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:37,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:37,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:37,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175759949] [2020-10-16 11:43:37,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:37,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:37,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:37,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:37,822 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:38,480 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-16 11:43:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:38,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:38,481 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:43:38,482 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:43:38,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:43:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-16 11:43:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:38,485 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:38,485 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:38,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:38,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:38,486 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:38,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 11:43:38,687 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-16 11:43:38,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:38,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588040187] [2020-10-16 11:43:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:38,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588040187] [2020-10-16 11:43:38,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202332727] [2020-10-16 11:43:38,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:38,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:38,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:38,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835876133] [2020-10-16 11:43:38,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:38,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:38,984 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:39,576 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-16 11:43:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:39,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:39,578 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:39,578 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:39,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:39,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-16 11:43:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:39,581 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:39,581 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:39,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:39,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:39,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:39,581 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:39,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 11:43:39,785 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-16 11:43:39,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:39,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597229248] [2020-10-16 11:43:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:40,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597229248] [2020-10-16 11:43:40,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342248507] [2020-10-16 11:43:40,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:40,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:40,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:40,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:40,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:40,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:40,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:40,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547014677] [2020-10-16 11:43:40,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:40,114 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:40,872 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-16 11:43:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:40,873 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:40,874 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:40,874 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:40,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:40,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-16 11:43:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:40,876 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:40,877 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:40,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:40,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:40,877 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:41,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 11:43:41,086 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:41,086 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-16 11:43:41,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:41,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114243808] [2020-10-16 11:43:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:41,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114243808] [2020-10-16 11:43:41,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040013833] [2020-10-16 11:43:41,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:41,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:41,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:41,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:41,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:41,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:41,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:41,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474828492] [2020-10-16 11:43:41,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:41,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:41,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:41,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:41,381 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:42,040 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-16 11:43:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:42,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:42,042 INFO L225 Difference]: With dead ends: 110 [2020-10-16 11:43:42,042 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:43:42,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:43:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-16 11:43:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:42,045 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:42,045 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:42,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:42,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:42,046 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:42,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 11:43:42,247 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:42,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-16 11:43:42,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:42,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640118700] [2020-10-16 11:43:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:42,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640118700] [2020-10-16 11:43:42,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916974831] [2020-10-16 11:43:42,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:42,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:42,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:42,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:42,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:42,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:42,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842594030] [2020-10-16 11:43:42,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:42,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:42,576 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:43,416 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-16 11:43:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:43,417 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:43,418 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:43:43,418 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:43:43,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:43:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-16 11:43:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:43,420 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:43,420 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:43,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:43,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:43,421 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:43,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:43,621 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:43,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-16 11:43:43,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:43,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601822433] [2020-10-16 11:43:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:43,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601822433] [2020-10-16 11:43:43,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846801557] [2020-10-16 11:43:43,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:43,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:43,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:43,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:43,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:43,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:43,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:43,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995727239] [2020-10-16 11:43:43,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:43,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:43,921 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:44,641 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-16 11:43:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:44,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:44,643 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:43:44,643 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:43:44,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:43:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-16 11:43:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:44,646 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:44,646 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:44,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:44,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:44,647 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:44,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 11:43:44,854 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-16 11:43:44,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:44,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429461015] [2020-10-16 11:43:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:45,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429461015] [2020-10-16 11:43:45,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201872907] [2020-10-16 11:43:45,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:45,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:45,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:45,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:45,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:45,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:45,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355919120] [2020-10-16 11:43:45,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:45,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:45,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:45,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:45,180 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:46,136 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-16 11:43:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:46,136 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:46,137 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:43:46,137 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 11:43:46,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 11:43:46,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-16 11:43:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:46,139 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:46,140 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:46,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:46,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:46,140 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:46,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:46,341 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-16 11:43:46,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:46,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273215871] [2020-10-16 11:43:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:46,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273215871] [2020-10-16 11:43:46,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140225320] [2020-10-16 11:43:46,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:46,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:46,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:46,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:46,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:46,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420544498] [2020-10-16 11:43:46,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:46,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:46,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:46,624 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:47,419 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-16 11:43:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:47,419 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:47,420 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:43:47,420 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:43:47,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:43:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:43:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-16 11:43:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:47,423 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:47,423 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:47,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:47,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:47,424 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:47,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:47,625 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:47,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:47,625 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-16 11:43:47,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:47,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606971051] [2020-10-16 11:43:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:47,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606971051] [2020-10-16 11:43:47,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753544424] [2020-10-16 11:43:47,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:47,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:47,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:47,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:47,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:47,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:47,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:47,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216964849] [2020-10-16 11:43:47,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:47,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:47,927 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:48,958 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 11:43:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:48,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:48,960 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:43:48,960 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:43:48,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:43:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:43:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-16 11:43:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:48,963 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:48,963 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:48,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:48,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:48,964 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:49,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-16 11:43:49,164 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-16 11:43:49,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:49,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432547223] [2020-10-16 11:43:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:49,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432547223] [2020-10-16 11:43:49,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299753598] [2020-10-16 11:43:49,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:49,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:49,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:49,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:49,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:49,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:49,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87612139] [2020-10-16 11:43:49,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:49,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:49,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:49,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:49,448 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:50,303 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-16 11:43:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:43:50,304 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:50,305 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:43:50,305 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:43:50,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:43:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:43:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-16 11:43:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:50,307 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:50,307 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:50,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:50,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:50,308 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:50,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:50,509 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-16 11:43:50,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:50,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790814236] [2020-10-16 11:43:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:50,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790814236] [2020-10-16 11:43:50,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105279104] [2020-10-16 11:43:50,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:50,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:50,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:50,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:50,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:50,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:50,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:50,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117675853] [2020-10-16 11:43:50,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:50,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:50,807 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:51,941 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-16 11:43:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:43:51,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:51,942 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:43:51,942 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:43:51,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:43:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:43:51,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-16 11:43:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:51,944 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:51,945 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:51,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:51,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:51,945 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:52,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 11:43:52,146 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-16 11:43:52,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:52,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827111027] [2020-10-16 11:43:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827111027] [2020-10-16 11:43:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446714592] [2020-10-16 11:43:52,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:52,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:52,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:52,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:52,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:52,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:52,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:52,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845137800] [2020-10-16 11:43:52,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:52,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:52,427 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:53,350 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 11:43:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:53,351 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:53,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:53,352 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:53,352 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:53,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:43:53,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-16 11:43:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 11:43:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-16 11:43:53,355 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-16 11:43:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:53,355 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-16 11:43:53,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-16 11:43:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:53,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:53,356 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:53,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 11:43:53,557 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-16 11:43:53,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:53,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056391219] [2020-10-16 11:43:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:53,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056391219] [2020-10-16 11:43:53,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903907755] [2020-10-16 11:43:53,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:53,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:53,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:53,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:53,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:53,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:53,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:53,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595693376] [2020-10-16 11:43:53,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:53,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:53,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:53,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:53,864 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-16 11:43:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:55,033 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-16 11:43:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:43:55,034 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:55,035 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:43:55,035 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:43:55,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:43:55,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:43:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-16 11:43:55,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:43:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-16 11:43:55,037 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-16 11:43:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:55,037 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-16 11:43:55,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-16 11:43:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:55,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:55,038 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:55,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 11:43:55,239 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:55,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-16 11:43:55,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:55,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063300637] [2020-10-16 11:43:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:55,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063300637] [2020-10-16 11:43:55,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644197805] [2020-10-16 11:43:55,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:55,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:55,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:55,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:55,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:55,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:55,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565798936] [2020-10-16 11:43:55,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:55,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:55,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:55,536 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-16 11:43:56,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:56,621 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 11:43:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:56,622 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:56,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:56,623 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:43:56,623 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:43:56,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:43:56,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:43:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-16 11:43:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:43:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 11:43:56,626 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-16 11:43:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:56,626 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 11:43:56,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 11:43:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:56,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:56,626 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:56,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 11:43:56,827 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:56,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-16 11:43:56,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:56,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210934236] [2020-10-16 11:43:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:57,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210934236] [2020-10-16 11:43:57,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017527348] [2020-10-16 11:43:57,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:57,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:57,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:57,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:57,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:57,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:57,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:43:57,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439369585] [2020-10-16 11:43:57,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:43:57,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:57,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:43:57,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:43:57,159 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-16 11:43:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:58,329 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-16 11:43:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:58,330 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:43:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:58,331 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:43:58,331 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:43:58,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:43:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:43:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 11:43:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:43:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 11:43:58,333 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-16 11:43:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:58,333 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 11:43:58,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:43:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 11:43:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:58,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:58,334 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:58,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:58,534 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:58,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:58,535 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-16 11:43:58,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:58,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512580808] [2020-10-16 11:43:58,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:58,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512580808] [2020-10-16 11:43:58,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901097943] [2020-10-16 11:43:58,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:58,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:43:58,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:58,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:58,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:58,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:43:58,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634555329] [2020-10-16 11:43:58,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:58,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:58,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:58,909 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-16 11:43:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:59,394 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-16 11:43:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:43:59,395 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:43:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:59,395 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:43:59,396 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:43:59,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:43:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:43:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-16 11:43:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:43:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-16 11:43:59,398 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-16 11:43:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:59,399 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-16 11:43:59,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-16 11:43:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:59,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:59,399 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:59,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:59,600 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-16 11:43:59,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:59,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951145626] [2020-10-16 11:43:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:59,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951145626] [2020-10-16 11:43:59,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797252690] [2020-10-16 11:43:59,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:59,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:59,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:59,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:59,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:59,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:59,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:43:59,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267831095] [2020-10-16 11:43:59,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:43:59,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:59,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:43:59,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:43:59,993 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-16 11:44:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:00,543 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-16 11:44:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:44:00,544 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:00,544 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:44:00,545 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:44:00,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:44:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:44:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-16 11:44:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:44:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-16 11:44:00,547 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-16 11:44:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:00,547 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-16 11:44:00,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-16 11:44:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:00,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:00,548 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:00,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:00,749 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-16 11:44:00,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:00,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346775824] [2020-10-16 11:44:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:01,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346775824] [2020-10-16 11:44:01,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146281801] [2020-10-16 11:44:01,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:01,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:01,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:01,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:01,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:01,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:01,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:01,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487048193] [2020-10-16 11:44:01,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:01,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:01,117 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-16 11:44:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:01,726 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-16 11:44:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:44:01,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:01,727 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:44:01,728 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:01,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:44:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-16 11:44:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:44:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-16 11:44:01,729 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-16 11:44:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:01,729 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-16 11:44:01,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-16 11:44:01,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:01,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:01,730 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:01,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:01,931 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-16 11:44:01,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:01,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530587190] [2020-10-16 11:44:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:02,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530587190] [2020-10-16 11:44:02,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93641271] [2020-10-16 11:44:02,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:02,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:02,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:02,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:02,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:02,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:02,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:02,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311080560] [2020-10-16 11:44:02,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:02,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:02,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:02,323 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-16 11:44:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:02,954 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-16 11:44:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:44:02,955 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:02,955 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:44:02,956 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:44:02,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:44:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:44:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-16 11:44:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:44:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-16 11:44:02,959 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-16 11:44:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:02,959 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-16 11:44:02,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-16 11:44:02,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:02,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:02,960 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:03,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:03,161 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-16 11:44:03,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:03,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252692791] [2020-10-16 11:44:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:03,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252692791] [2020-10-16 11:44:03,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493374110] [2020-10-16 11:44:03,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:03,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:03,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:03,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:03,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400171883] [2020-10-16 11:44:03,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:03,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:03,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:03,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:03,499 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-16 11:44:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:04,153 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-16 11:44:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:44:04,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:04,154 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:44:04,154 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:44:04,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:44:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:44:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-16 11:44:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:44:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-16 11:44:04,157 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-16 11:44:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:04,158 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-16 11:44:04,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-16 11:44:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:04,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:04,158 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:04,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:04,359 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-16 11:44:04,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:04,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331679624] [2020-10-16 11:44:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:04,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331679624] [2020-10-16 11:44:04,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720870314] [2020-10-16 11:44:04,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:04,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:04,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:04,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:04,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:04,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097528816] [2020-10-16 11:44:04,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:04,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:04,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:04,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:04,727 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-16 11:44:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:05,484 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-16 11:44:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:44:05,484 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:05,485 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:44:05,485 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:44:05,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:44:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:44:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-16 11:44:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:44:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-16 11:44:05,488 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-16 11:44:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:05,489 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-16 11:44:05,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-16 11:44:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:05,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:05,489 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:05,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:05,690 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:05,691 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-16 11:44:05,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:05,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550173561] [2020-10-16 11:44:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:05,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550173561] [2020-10-16 11:44:05,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69786054] [2020-10-16 11:44:05,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:06,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:06,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:06,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:06,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:06,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:06,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783871702] [2020-10-16 11:44:06,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:06,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:06,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:06,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:06,026 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-16 11:44:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:06,744 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-16 11:44:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:44:06,745 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:06,745 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:44:06,745 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:44:06,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:44:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:44:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-16 11:44:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:44:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-16 11:44:06,748 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-16 11:44:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:06,748 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-16 11:44:06,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-16 11:44:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:06,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:06,749 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:06,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 11:44:06,950 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:06,950 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-16 11:44:06,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:06,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848427687] [2020-10-16 11:44:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:07,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848427687] [2020-10-16 11:44:07,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045840106] [2020-10-16 11:44:07,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:07,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:07,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:07,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:07,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:07,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:07,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:07,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878391266] [2020-10-16 11:44:07,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:07,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:07,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:07,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:07,313 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-16 11:44:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:08,130 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-16 11:44:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:44:08,131 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:08,131 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:44:08,131 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:44:08,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:44:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:44:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-16 11:44:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:44:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-16 11:44:08,134 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-16 11:44:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:08,134 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-16 11:44:08,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-16 11:44:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:08,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:08,135 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:08,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 11:44:08,335 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:08,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:08,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-16 11:44:08,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:08,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782988041] [2020-10-16 11:44:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:08,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782988041] [2020-10-16 11:44:08,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810837793] [2020-10-16 11:44:08,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:08,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:08,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:08,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:08,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:08,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823959910] [2020-10-16 11:44:08,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:08,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:08,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:08,662 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-16 11:44:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:09,452 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-16 11:44:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:44:09,453 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:09,453 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:44:09,453 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 11:44:09,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:44:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 11:44:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-16 11:44:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:44:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-16 11:44:09,456 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-16 11:44:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:09,456 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-16 11:44:09,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-16 11:44:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:09,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:09,457 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:09,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 11:44:09,658 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-16 11:44:09,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:09,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268871630] [2020-10-16 11:44:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:09,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268871630] [2020-10-16 11:44:09,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429825504] [2020-10-16 11:44:09,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:09,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:09,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:09,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:10,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:10,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:10,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:10,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309964581] [2020-10-16 11:44:10,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:10,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:10,021 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-16 11:44:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:10,934 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-16 11:44:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:44:10,934 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:10,935 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:44:10,935 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:44:10,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:44:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:44:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-16 11:44:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:44:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-16 11:44:10,938 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-16 11:44:10,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:10,938 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-16 11:44:10,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:10,938 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-16 11:44:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:10,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:10,938 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:11,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 11:44:11,139 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:11,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-16 11:44:11,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:11,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313658269] [2020-10-16 11:44:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:11,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313658269] [2020-10-16 11:44:11,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099216789] [2020-10-16 11:44:11,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:11,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:11,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:11,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735658592] [2020-10-16 11:44:11,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:11,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:11,459 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-16 11:44:12,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:12,298 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 11:44:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:44:12,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:12,299 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:44:12,300 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:44:12,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:44:12,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:44:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-16 11:44:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:44:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-16 11:44:12,302 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-16 11:44:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:12,302 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-16 11:44:12,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-16 11:44:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:12,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:12,303 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:12,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:12,504 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:12,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-16 11:44:12,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:12,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420210270] [2020-10-16 11:44:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:12,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420210270] [2020-10-16 11:44:12,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127954017] [2020-10-16 11:44:12,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:12,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:12,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:12,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:12,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:12,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:12,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:12,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271295635] [2020-10-16 11:44:12,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:12,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:12,858 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-16 11:44:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:13,883 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-16 11:44:13,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:44:13,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:13,884 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:44:13,884 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:44:13,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:44:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:44:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-16 11:44:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:44:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-16 11:44:13,887 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-16 11:44:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:13,888 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-16 11:44:13,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-16 11:44:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:13,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:13,888 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:14,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:14,089 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:14,089 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-16 11:44:14,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:14,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176690659] [2020-10-16 11:44:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:14,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176690659] [2020-10-16 11:44:14,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637252190] [2020-10-16 11:44:14,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:14,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:14,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:14,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:14,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:14,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:14,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:14,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503530287] [2020-10-16 11:44:14,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:14,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:14,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:14,413 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-16 11:44:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:15,323 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 11:44:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:15,324 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:15,324 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:44:15,324 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:44:15,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:44:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:44:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-16 11:44:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:44:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:44:15,327 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-16 11:44:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:15,328 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:44:15,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:44:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:15,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:15,328 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:15,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-16 11:44:15,529 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-16 11:44:15,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:15,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306561204] [2020-10-16 11:44:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:15,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306561204] [2020-10-16 11:44:15,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399876917] [2020-10-16 11:44:15,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:15,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:15,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:15,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:15,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:15,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:15,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:15,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:15,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145969779] [2020-10-16 11:44:15,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:15,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:15,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:15,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:15,871 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-16 11:44:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:16,973 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 11:44:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:44:16,974 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:16,975 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:44:16,975 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:44:16,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:44:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:44:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-16 11:44:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:44:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:44:16,978 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-16 11:44:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:16,978 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:44:16,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:44:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:16,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:16,978 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:17,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:17,179 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-16 11:44:17,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:17,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319931287] [2020-10-16 11:44:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:17,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319931287] [2020-10-16 11:44:17,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787578993] [2020-10-16 11:44:17,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:17,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:17,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:17,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:17,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:17,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:17,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700080655] [2020-10-16 11:44:17,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:17,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:17,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:17,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:17,497 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-16 11:44:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:18,487 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-16 11:44:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:44:18,488 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:18,488 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:18,488 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:18,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-16 11:44:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:44:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-16 11:44:18,493 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-16 11:44:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:18,493 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-16 11:44:18,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:18,494 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-16 11:44:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:18,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:18,494 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:18,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:18,702 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-16 11:44:18,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:18,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716557658] [2020-10-16 11:44:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:18,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716557658] [2020-10-16 11:44:18,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389920127] [2020-10-16 11:44:18,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:19,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:19,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:19,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:19,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:19,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:19,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:19,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:19,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522560768] [2020-10-16 11:44:19,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:19,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:19,047 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-16 11:44:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:20,266 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-16 11:44:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:44:20,267 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:20,267 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:20,267 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:44:20,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:44:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:44:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-16 11:44:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:44:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 11:44:20,271 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-16 11:44:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:20,271 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 11:44:20,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 11:44:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:20,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:20,272 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:20,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:20,481 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:20,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:20,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-16 11:44:20,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:20,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17420103] [2020-10-16 11:44:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:20,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17420103] [2020-10-16 11:44:20,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507762319] [2020-10-16 11:44:20,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:20,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:20,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:20,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:20,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150337697] [2020-10-16 11:44:20,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:20,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:20,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:20,798 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-16 11:44:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:21,825 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-16 11:44:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:21,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:21,826 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:44:21,826 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:44:21,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:44:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:44:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-16 11:44:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:44:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-16 11:44:21,831 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-16 11:44:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:21,831 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-16 11:44:21,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-16 11:44:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:21,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:21,832 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:22,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:22,041 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:22,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:22,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-16 11:44:22,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:22,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563973617] [2020-10-16 11:44:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:22,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563973617] [2020-10-16 11:44:22,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513364304] [2020-10-16 11:44:22,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:22,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:22,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:22,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:22,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:22,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:22,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:22,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517572393] [2020-10-16 11:44:22,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:22,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:22,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:22,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:22,373 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-16 11:44:23,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:23,591 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-16 11:44:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:44:23,592 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:23,592 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:44:23,593 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:23,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:44:23,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-16 11:44:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 11:44:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-16 11:44:23,594 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-16 11:44:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:23,595 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-16 11:44:23,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-16 11:44:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:23,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:23,595 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:23,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:23,796 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-16 11:44:23,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:23,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016903300] [2020-10-16 11:44:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:24,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016903300] [2020-10-16 11:44:24,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468917311] [2020-10-16 11:44:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:24,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:24,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:24,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:24,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:24,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:24,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:24,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462403380] [2020-10-16 11:44:24,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:24,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:24,215 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-16 11:44:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:24,800 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-16 11:44:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:44:24,801 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:24,802 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:44:24,802 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:44:24,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:44:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:44:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-16 11:44:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:24,804 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:24,805 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:24,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:24,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:24,805 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:25,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-16 11:44:25,006 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-16 11:44:25,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:25,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041586778] [2020-10-16 11:44:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:25,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041586778] [2020-10-16 11:44:25,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806361763] [2020-10-16 11:44:25,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:25,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:25,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:25,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:25,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:25,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:25,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741573709] [2020-10-16 11:44:25,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:25,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:25,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:25,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:25,447 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:26,133 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-16 11:44:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:44:26,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:26,134 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:44:26,135 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:44:26,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:44:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:44:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-16 11:44:26,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:26,138 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:26,138 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:26,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:26,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:26,139 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:26,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 11:44:26,339 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:26,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-16 11:44:26,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:26,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710344983] [2020-10-16 11:44:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:26,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710344983] [2020-10-16 11:44:26,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477138515] [2020-10-16 11:44:26,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:26,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:26,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:26,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:26,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:26,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:26,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522296073] [2020-10-16 11:44:26,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:26,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:26,737 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:27,395 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-16 11:44:27,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:44:27,396 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:27,397 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:44:27,397 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:44:27,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:44:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:44:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-16 11:44:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:27,400 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:27,401 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:27,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:27,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:27,401 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:27,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:27,602 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:27,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-16 11:44:27,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:27,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983901617] [2020-10-16 11:44:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:27,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983901617] [2020-10-16 11:44:27,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118181373] [2020-10-16 11:44:27,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:27,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:27,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:27,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:27,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:28,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:28,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:28,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:28,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375417976] [2020-10-16 11:44:28,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:28,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:28,033 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:28,781 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-16 11:44:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:44:28,782 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:28,783 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:44:28,783 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:44:28,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:44:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:44:28,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-16 11:44:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:28,786 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:28,786 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:28,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:28,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:28,787 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:28,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-16 11:44:28,988 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-16 11:44:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:28,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669824782] [2020-10-16 11:44:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:29,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669824782] [2020-10-16 11:44:29,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134250273] [2020-10-16 11:44:29,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:29,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:29,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:29,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:29,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:29,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916927161] [2020-10-16 11:44:29,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:29,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:29,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:29,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:29,380 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:30,098 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-16 11:44:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:44:30,099 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:30,100 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:44:30,100 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:44:30,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:44:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:44:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-16 11:44:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:30,103 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:30,103 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:30,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:30,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:30,104 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:30,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:30,304 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-16 11:44:30,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:30,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687477145] [2020-10-16 11:44:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:30,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687477145] [2020-10-16 11:44:30,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808764531] [2020-10-16 11:44:30,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:30,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:30,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:30,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:30,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:30,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:30,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816199818] [2020-10-16 11:44:30,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:30,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:30,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:30,703 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:31,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:31,597 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-16 11:44:31,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:44:31,598 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:31,598 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:44:31,598 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:44:31,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:44:31,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:44:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-16 11:44:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:31,601 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:31,602 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:31,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:31,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:31,602 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:31,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:31,803 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:31,804 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-16 11:44:31,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:31,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684572077] [2020-10-16 11:44:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:32,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684572077] [2020-10-16 11:44:32,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952240068] [2020-10-16 11:44:32,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:32,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:32,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:32,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:32,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:32,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:32,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:32,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460512107] [2020-10-16 11:44:32,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:32,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:32,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:32,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:32,180 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:32,968 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 11:44:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:44:32,969 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:32,970 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:44:32,970 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:44:32,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:44:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:44:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-16 11:44:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:32,973 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:32,973 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:32,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:32,974 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:32,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:32,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:32,974 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:33,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:33,175 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:33,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-16 11:44:33,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:33,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870519598] [2020-10-16 11:44:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:33,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870519598] [2020-10-16 11:44:33,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764484102] [2020-10-16 11:44:33,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:33,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:33,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:33,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:33,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:33,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:33,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:33,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:33,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26036275] [2020-10-16 11:44:33,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:33,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:33,573 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:34,554 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-16 11:44:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:44:34,554 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:34,556 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:34,556 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:34,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:44:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-16 11:44:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:34,559 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:34,559 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:34,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:34,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:34,560 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:34,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:34,768 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-16 11:44:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:34,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274487218] [2020-10-16 11:44:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:35,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274487218] [2020-10-16 11:44:35,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893771425] [2020-10-16 11:44:35,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:35,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:35,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:35,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:35,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:35,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:35,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:35,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985992404] [2020-10-16 11:44:35,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:35,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:35,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:35,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:35,131 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:36,005 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-16 11:44:36,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:44:36,006 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:36,007 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:36,007 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:44:36,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:44:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:44:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-16 11:44:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:36,010 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:36,010 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:36,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:36,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:36,010 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:36,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-16 11:44:36,211 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-16 11:44:36,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:36,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586793411] [2020-10-16 11:44:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:36,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586793411] [2020-10-16 11:44:36,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256773527] [2020-10-16 11:44:36,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:36,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:36,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:36,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:36,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:36,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:36,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:36,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:36,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505206623] [2020-10-16 11:44:36,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:36,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:36,598 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:37,689 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-16 11:44:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:44:37,690 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:37,691 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:44:37,691 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:37,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:44:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-16 11:44:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:37,695 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:37,695 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:37,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:37,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:37,696 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:37,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:37,906 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:37,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-16 11:44:37,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:37,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646820929] [2020-10-16 11:44:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:38,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646820929] [2020-10-16 11:44:38,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978206322] [2020-10-16 11:44:38,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:38,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:38,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:38,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:38,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:38,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049019763] [2020-10-16 11:44:38,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:38,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:38,259 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:39,191 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-16 11:44:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:44:39,192 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:39,193 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:44:39,193 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:44:39,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:44:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:44:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-16 11:44:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:39,196 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:39,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:39,196 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:39,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:39,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:39,197 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:39,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-16 11:44:39,398 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:39,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-16 11:44:39,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:39,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659195454] [2020-10-16 11:44:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659195454] [2020-10-16 11:44:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822660020] [2020-10-16 11:44:39,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:39,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:39,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:39,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:39,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:39,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:39,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:39,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:39,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014720160] [2020-10-16 11:44:39,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:39,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:39,781 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:40,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:40,988 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-16 11:44:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:44:40,989 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:40,990 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:44:40,990 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:44:40,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:44:40,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-16 11:44:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:40,993 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:40,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:40,993 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:40,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:40,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:40,994 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:41,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 11:44:41,195 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:41,195 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-16 11:44:41,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:41,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885713339] [2020-10-16 11:44:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:41,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885713339] [2020-10-16 11:44:41,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978130662] [2020-10-16 11:44:41,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:41,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:41,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:41,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:41,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:41,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:41,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599509686] [2020-10-16 11:44:41,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:41,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:41,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:41,540 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:42,565 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 11:44:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:42,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:42,566 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:44:42,566 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:44:42,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:44:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:44:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-16 11:44:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:42,569 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:42,570 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:42,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:42,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:42,570 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:42,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:42,772 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-16 11:44:42,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:42,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276777817] [2020-10-16 11:44:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:43,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276777817] [2020-10-16 11:44:43,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557336997] [2020-10-16 11:44:43,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:43,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:43,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:43,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:43,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:43,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071797037] [2020-10-16 11:44:43,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:43,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:43,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:43,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:43,144 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:44,462 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 11:44:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:44:44,463 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:44,464 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:44:44,464 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:44:44,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:44:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:44:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-16 11:44:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:44,467 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:44,467 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:44,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:44,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:44,468 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:44,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:44,675 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:44,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-16 11:44:44,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:44,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258166515] [2020-10-16 11:44:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:44,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258166515] [2020-10-16 11:44:44,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333209130] [2020-10-16 11:44:44,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:44,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:44,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:44,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:44,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:45,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:45,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:45,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729139605] [2020-10-16 11:44:45,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:45,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:45,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:45,024 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:46,128 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-16 11:44:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:44:46,129 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:46,130 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:44:46,130 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:44:46,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:44:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:44:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-16 11:44:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:46,133 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:46,133 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:46,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:46,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:46,133 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:46,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:46,334 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:46,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-16 11:44:46,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:46,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489443880] [2020-10-16 11:44:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:46,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489443880] [2020-10-16 11:44:46,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658726848] [2020-10-16 11:44:46,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:46,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:46,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:46,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:46,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:46,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:46,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:46,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671332880] [2020-10-16 11:44:46,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:46,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:46,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:46,734 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:48,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:48,163 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-16 11:44:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:44:48,164 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:48,165 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:44:48,165 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:44:48,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:44:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:44:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-16 11:44:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:48,169 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:48,169 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:48,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:48,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:48,170 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:48,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-16 11:44:48,378 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:48,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-16 11:44:48,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:48,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635341618] [2020-10-16 11:44:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:48,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635341618] [2020-10-16 11:44:48,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114088347] [2020-10-16 11:44:48,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:48,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:48,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:48,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:48,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304459649] [2020-10-16 11:44:48,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:48,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:48,725 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:49,892 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-16 11:44:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:49,893 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:49,894 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:49,894 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:49,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:44:49,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:49,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-16 11:44:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 11:44:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-16 11:44:49,897 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-16 11:44:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:49,898 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-16 11:44:49,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-16 11:44:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:49,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:49,898 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:50,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:50,099 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:50,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-16 11:44:50,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:50,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561766048] [2020-10-16 11:44:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:50,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561766048] [2020-10-16 11:44:50,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930381366] [2020-10-16 11:44:50,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:50,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:50,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:50,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:50,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:50,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:50,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:50,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456556822] [2020-10-16 11:44:50,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:50,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:50,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:50,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:50,470 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-16 11:44:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:51,956 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-16 11:44:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 11:44:51,957 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:51,957 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:44:51,957 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:44:51,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:44:51,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:44:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-16 11:44:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:44:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-16 11:44:51,960 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-16 11:44:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:51,960 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-16 11:44:51,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-16 11:44:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:51,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:51,961 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:52,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:52,161 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:52,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:52,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-16 11:44:52,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:52,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960175418] [2020-10-16 11:44:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:52,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960175418] [2020-10-16 11:44:52,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175759901] [2020-10-16 11:44:52,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:52,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:52,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:52,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:52,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:52,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517475541] [2020-10-16 11:44:52,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:52,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:52,553 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-16 11:44:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:53,991 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-16 11:44:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:53,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:53,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:53,992 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:53,992 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:44:53,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:44:53,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:44:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-16 11:44:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:44:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 11:44:53,995 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-16 11:44:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:53,995 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 11:44:53,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 11:44:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:53,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:53,996 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:54,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:54,196 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-16 11:44:54,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:54,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901124774] [2020-10-16 11:44:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:54,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901124774] [2020-10-16 11:44:54,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657034114] [2020-10-16 11:44:54,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:54,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:54,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:54,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:54,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:54,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:54,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:54,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:44:54,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406838978] [2020-10-16 11:44:54,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:44:54,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:54,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:44:54,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:44:54,606 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-16 11:44:56,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:56,115 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-16 11:44:56,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:56,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:44:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:56,116 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:44:56,116 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:44:56,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 11:44:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:44:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-16 11:44:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:44:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 11:44:56,118 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-16 11:44:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:56,119 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 11:44:56,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:44:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 11:44:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:56,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:56,119 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:56,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:56,320 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-16 11:44:56,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:56,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475641525] [2020-10-16 11:44:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:56,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475641525] [2020-10-16 11:44:56,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311914328] [2020-10-16 11:44:56,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:56,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:44:56,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:56,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:56,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:56,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:56,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:44:56,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908317556] [2020-10-16 11:44:56,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:56,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:56,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:56,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:56,773 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-16 11:44:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:57,396 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-16 11:44:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:44:57,397 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:44:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:57,397 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:44:57,398 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:44:57,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:44:57,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:44:57,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-16 11:44:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:44:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-16 11:44:57,400 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-16 11:44:57,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:57,401 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-16 11:44:57,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-16 11:44:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:57,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:57,401 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:57,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-16 11:44:57,602 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:57,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-16 11:44:57,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:57,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105829514] [2020-10-16 11:44:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:58,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105829514] [2020-10-16 11:44:58,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105772947] [2020-10-16 11:44:58,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:58,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:44:58,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:58,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:58,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:58,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:58,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:58,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:44:58,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550646098] [2020-10-16 11:44:58,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:44:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:44:58,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:44:58,095 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-16 11:44:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:58,738 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-16 11:44:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:44:58,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:44:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:58,740 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:44:58,740 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:44:58,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:44:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:44:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-16 11:44:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:44:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-16 11:44:58,742 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-16 11:44:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:58,743 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-16 11:44:58,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:44:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-16 11:44:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:58,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:58,744 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:58,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-16 11:44:58,944 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:58,945 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-16 11:44:58,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:58,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265992533] [2020-10-16 11:44:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:59,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265992533] [2020-10-16 11:44:59,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301615979] [2020-10-16 11:44:59,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:59,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:59,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:59,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:59,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:44:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355286211] [2020-10-16 11:44:59,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:59,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:59,394 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-16 11:45:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:00,135 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-16 11:45:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:45:00,136 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:00,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:00,137 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:45:00,137 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:45:00,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:45:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:45:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-16 11:45:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:45:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-16 11:45:00,140 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-16 11:45:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:00,140 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-16 11:45:00,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-16 11:45:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:00,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:00,141 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:00,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-16 11:45:00,343 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:00,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:00,343 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-16 11:45:00,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:00,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919903324] [2020-10-16 11:45:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:00,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919903324] [2020-10-16 11:45:00,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837336215] [2020-10-16 11:45:00,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:00,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:00,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:00,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:00,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:00,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:00,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210872353] [2020-10-16 11:45:00,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:00,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:00,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:00,822 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-16 11:45:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:01,597 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-16 11:45:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:45:01,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:01,598 INFO L225 Difference]: With dead ends: 139 [2020-10-16 11:45:01,598 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 11:45:01,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:45:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 11:45:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-16 11:45:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:45:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-16 11:45:01,602 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-16 11:45:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:01,602 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-16 11:45:01,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-16 11:45:01,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:01,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:01,603 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:01,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-16 11:45:01,810 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:01,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-16 11:45:01,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:01,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319325826] [2020-10-16 11:45:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:02,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319325826] [2020-10-16 11:45:02,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583690926] [2020-10-16 11:45:02,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:02,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:02,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:02,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:02,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:02,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:02,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910402670] [2020-10-16 11:45:02,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:02,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:02,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:02,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:02,245 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-16 11:45:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:03,045 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-16 11:45:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:45:03,046 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:03,047 INFO L225 Difference]: With dead ends: 139 [2020-10-16 11:45:03,047 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 11:45:03,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:45:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 11:45:03,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-16 11:45:03,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:45:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-16 11:45:03,049 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-16 11:45:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:03,050 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-16 11:45:03,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-16 11:45:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:03,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:03,050 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:03,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:03,251 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:03,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-16 11:45:03,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:03,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677117043] [2020-10-16 11:45:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:03,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677117043] [2020-10-16 11:45:03,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003366867] [2020-10-16 11:45:03,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:03,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:03,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:03,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:03,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:03,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:03,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:03,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:03,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211478300] [2020-10-16 11:45:03,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:03,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:03,712 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-16 11:45:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:04,606 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-16 11:45:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:45:04,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:04,607 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:45:04,607 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:45:04,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:45:04,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:45:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-16 11:45:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:45:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-16 11:45:04,609 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-16 11:45:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:04,609 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-16 11:45:04,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-16 11:45:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:04,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:04,610 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:04,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-16 11:45:04,811 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:04,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-16 11:45:04,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:04,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988016897] [2020-10-16 11:45:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:05,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988016897] [2020-10-16 11:45:05,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414607055] [2020-10-16 11:45:05,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:05,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:05,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:05,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:05,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:05,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:05,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157569103] [2020-10-16 11:45:05,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:05,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:05,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:05,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:05,233 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-16 11:45:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:06,089 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-16 11:45:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:45:06,090 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:06,091 INFO L225 Difference]: With dead ends: 137 [2020-10-16 11:45:06,091 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:45:06,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:45:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:45:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-16 11:45:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:45:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-16 11:45:06,095 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-16 11:45:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:06,095 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-16 11:45:06,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-16 11:45:06,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:06,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:06,095 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:06,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:06,296 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:06,297 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-16 11:45:06,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:06,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663931150] [2020-10-16 11:45:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:06,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663931150] [2020-10-16 11:45:06,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278972743] [2020-10-16 11:45:06,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:06,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:06,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:06,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:06,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:06,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:06,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:06,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184598812] [2020-10-16 11:45:06,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:06,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:06,793 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-16 11:45:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:07,797 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-16 11:45:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:45:07,798 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:07,798 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:45:07,798 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:45:07,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:45:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:45:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-16 11:45:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:45:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-16 11:45:07,801 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-16 11:45:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:07,801 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-16 11:45:07,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-16 11:45:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:07,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:07,801 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:08,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-16 11:45:08,002 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:08,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:08,003 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-16 11:45:08,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:08,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249200193] [2020-10-16 11:45:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:08,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249200193] [2020-10-16 11:45:08,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398895253] [2020-10-16 11:45:08,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:08,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:08,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:08,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:08,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007646228] [2020-10-16 11:45:08,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:08,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:08,398 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-16 11:45:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:09,333 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-16 11:45:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:45:09,334 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:09,334 INFO L225 Difference]: With dead ends: 135 [2020-10-16 11:45:09,334 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:45:09,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:45:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:45:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-16 11:45:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:45:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-16 11:45:09,337 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-16 11:45:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:09,337 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-16 11:45:09,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:09,337 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-16 11:45:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:09,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:09,337 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:09,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:09,538 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:09,539 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-16 11:45:09,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:09,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176102353] [2020-10-16 11:45:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:09,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176102353] [2020-10-16 11:45:09,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158552380] [2020-10-16 11:45:09,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:09,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:09,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:09,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:09,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:09,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:09,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611177373] [2020-10-16 11:45:09,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:09,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:09,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:09,970 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-16 11:45:11,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:11,080 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-16 11:45:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:45:11,081 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:11,082 INFO L225 Difference]: With dead ends: 132 [2020-10-16 11:45:11,082 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 11:45:11,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:45:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 11:45:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-16 11:45:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:45:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-16 11:45:11,085 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-16 11:45:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:11,085 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-16 11:45:11,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-16 11:45:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:11,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:11,085 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:11,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:11,286 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:11,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:11,286 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-16 11:45:11,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:11,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142337259] [2020-10-16 11:45:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:11,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142337259] [2020-10-16 11:45:11,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193863198] [2020-10-16 11:45:11,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:11,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:11,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:11,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:11,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:11,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:11,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:11,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634530184] [2020-10-16 11:45:11,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:11,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:11,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:11,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:11,682 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-16 11:45:12,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:12,711 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-16 11:45:12,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:45:12,712 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:12,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:12,712 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:45:12,712 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 11:45:12,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:45:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 11:45:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-16 11:45:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:45:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-16 11:45:12,714 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-16 11:45:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:12,714 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-16 11:45:12,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-16 11:45:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:12,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:12,714 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:12,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:12,915 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:12,916 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-16 11:45:12,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:12,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909924264] [2020-10-16 11:45:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:13,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909924264] [2020-10-16 11:45:13,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435932041] [2020-10-16 11:45:13,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:13,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:13,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:13,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:13,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:13,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99762111] [2020-10-16 11:45:13,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:13,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:13,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:13,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:13,336 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-16 11:45:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:14,570 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-16 11:45:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:45:14,571 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:14,572 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:45:14,572 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 11:45:14,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:45:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 11:45:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-16 11:45:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:45:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-16 11:45:14,574 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-16 11:45:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:14,575 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-16 11:45:14,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-16 11:45:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:14,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:14,575 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:14,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:14,776 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-16 11:45:14,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:14,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301989419] [2020-10-16 11:45:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:15,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301989419] [2020-10-16 11:45:15,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070293958] [2020-10-16 11:45:15,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:15,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:15,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:15,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:15,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:15,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:15,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:15,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126444579] [2020-10-16 11:45:15,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:15,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:15,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:15,165 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-16 11:45:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:16,279 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-16 11:45:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:45:16,280 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:16,280 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:45:16,280 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:45:16,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:45:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:45:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-16 11:45:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 11:45:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-16 11:45:16,283 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-16 11:45:16,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:16,283 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-16 11:45:16,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-16 11:45:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:16,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:16,284 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:16,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-16 11:45:16,484 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-16 11:45:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:16,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181574301] [2020-10-16 11:45:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:16,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181574301] [2020-10-16 11:45:16,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810508695] [2020-10-16 11:45:16,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:16,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:16,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:16,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:16,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:16,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:16,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464052533] [2020-10-16 11:45:16,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:16,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:16,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:16,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:16,904 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-16 11:45:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:18,208 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-16 11:45:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:45:18,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:18,210 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:45:18,210 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:45:18,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:45:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:45:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-16 11:45:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 11:45:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-16 11:45:18,212 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-16 11:45:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:18,212 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-16 11:45:18,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-16 11:45:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:18,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:18,212 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:18,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-16 11:45:18,413 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-16 11:45:18,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:18,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006209367] [2020-10-16 11:45:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006209367] [2020-10-16 11:45:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391981103] [2020-10-16 11:45:18,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:18,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:18,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:18,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:18,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055856781] [2020-10-16 11:45:18,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:18,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:18,796 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-16 11:45:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:19,994 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-16 11:45:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:45:19,996 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:19,996 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:45:19,996 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:45:19,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:45:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:45:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-16 11:45:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:45:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:45:19,999 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-16 11:45:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:20,000 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:45:20,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:45:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:20,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:20,000 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:20,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-16 11:45:20,201 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-16 11:45:20,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:20,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311963310] [2020-10-16 11:45:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:20,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311963310] [2020-10-16 11:45:20,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779861610] [2020-10-16 11:45:20,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:20,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:20,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:20,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:20,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:20,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:20,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692881319] [2020-10-16 11:45:20,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:20,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:20,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:20,615 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-16 11:45:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:22,091 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-16 11:45:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:45:22,092 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:22,092 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:45:22,092 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:45:22,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 11:45:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:45:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-16 11:45:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:45:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:45:22,094 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-16 11:45:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:22,094 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:45:22,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:45:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:22,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:22,095 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:22,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-16 11:45:22,296 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:22,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-16 11:45:22,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:22,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702841732] [2020-10-16 11:45:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:22,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702841732] [2020-10-16 11:45:22,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425719662] [2020-10-16 11:45:22,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:22,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:22,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:22,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:22,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:22,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:22,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:22,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689485804] [2020-10-16 11:45:22,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:22,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:22,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:22,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:22,679 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-16 11:45:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:23,895 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-16 11:45:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 11:45:23,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:23,896 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:45:23,896 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:45:23,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:45:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:45:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-16 11:45:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 11:45:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-16 11:45:23,899 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-16 11:45:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:23,899 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-16 11:45:23,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-16 11:45:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:23,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:23,900 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:24,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:24,100 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:24,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-16 11:45:24,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:24,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014335236] [2020-10-16 11:45:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:24,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014335236] [2020-10-16 11:45:24,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888358044] [2020-10-16 11:45:24,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:24,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:24,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:24,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:24,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:24,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:24,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:24,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:24,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914671681] [2020-10-16 11:45:24,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:24,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:24,504 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-16 11:45:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:26,038 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-16 11:45:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 11:45:26,039 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:26,039 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:45:26,039 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:45:26,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 11:45:26,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:45:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-16 11:45:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:45:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 11:45:26,042 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-16 11:45:26,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:26,042 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 11:45:26,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 11:45:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:26,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:26,043 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:26,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-16 11:45:26,250 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:26,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-16 11:45:26,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:26,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116671871] [2020-10-16 11:45:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:26,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116671871] [2020-10-16 11:45:26,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106470409] [2020-10-16 11:45:26,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:26,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:26,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:26,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:26,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:26,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:26,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:26,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030344096] [2020-10-16 11:45:26,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:26,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:26,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:26,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:26,640 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-16 11:45:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:27,927 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-16 11:45:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 11:45:27,928 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:27,928 INFO L225 Difference]: With dead ends: 144 [2020-10-16 11:45:27,929 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:45:27,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 11:45:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:45:27,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-16 11:45:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:45:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-16 11:45:27,933 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-16 11:45:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:27,933 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-16 11:45:27,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-16 11:45:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:27,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:27,934 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:28,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:28,143 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:28,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-16 11:45:28,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:28,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372655358] [2020-10-16 11:45:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:28,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372655358] [2020-10-16 11:45:28,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226996107] [2020-10-16 11:45:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:28,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:28,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:28,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:28,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:28,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:28,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832405296] [2020-10-16 11:45:28,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:28,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:28,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:28,551 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-16 11:45:30,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:30,144 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-16 11:45:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 11:45:30,145 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:30,145 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:45:30,145 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:45:30,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 11:45:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:45:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-16 11:45:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 11:45:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-16 11:45:30,148 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-16 11:45:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:30,148 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-16 11:45:30,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:30,148 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-16 11:45:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:30,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:30,149 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:30,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-16 11:45:30,350 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:30,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:30,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-16 11:45:30,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:30,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893705369] [2020-10-16 11:45:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:30,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893705369] [2020-10-16 11:45:30,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286614957] [2020-10-16 11:45:30,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:30,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:30,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:30,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:30,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:30,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110712712] [2020-10-16 11:45:30,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:30,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:30,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:30,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:30,847 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-16 11:45:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:31,578 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-16 11:45:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:45:31,579 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:31,580 INFO L225 Difference]: With dead ends: 144 [2020-10-16 11:45:31,580 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:45:31,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:45:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:45:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-16 11:45:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:31,583 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:31,584 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:31,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:31,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:31,584 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:31,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:31,785 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-16 11:45:31,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:31,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249651839] [2020-10-16 11:45:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:32,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249651839] [2020-10-16 11:45:32,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654782287] [2020-10-16 11:45:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:32,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:32,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:32,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:32,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:32,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:32,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:32,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:32,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400969720] [2020-10-16 11:45:32,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:32,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:32,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:32,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:32,335 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:33,190 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-16 11:45:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:45:33,191 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:33,191 INFO L225 Difference]: With dead ends: 141 [2020-10-16 11:45:33,191 INFO L226 Difference]: Without dead ends: 135 [2020-10-16 11:45:33,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:45:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-16 11:45:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-16 11:45:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:33,194 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:33,195 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:33,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:33,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:33,195 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:33,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-16 11:45:33,396 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:33,396 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-16 11:45:33,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:33,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204101193] [2020-10-16 11:45:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:33,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204101193] [2020-10-16 11:45:33,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637087930] [2020-10-16 11:45:33,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:33,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:33,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:33,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:33,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:33,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:33,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:33,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759682262] [2020-10-16 11:45:33,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:33,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:33,867 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:34,715 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-16 11:45:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:45:34,717 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:34,717 INFO L225 Difference]: With dead ends: 138 [2020-10-16 11:45:34,717 INFO L226 Difference]: Without dead ends: 132 [2020-10-16 11:45:34,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:45:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-16 11:45:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-16 11:45:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:34,721 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:34,721 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:34,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:34,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:34,721 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:34,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:34,922 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:34,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:34,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-16 11:45:34,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:34,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016885251] [2020-10-16 11:45:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:35,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016885251] [2020-10-16 11:45:35,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738459595] [2020-10-16 11:45:35,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:35,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:35,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:35,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:35,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:35,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:35,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:35,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253405134] [2020-10-16 11:45:35,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:35,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:35,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:35,458 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:36,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:36,440 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-16 11:45:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:45:36,441 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:36,442 INFO L225 Difference]: With dead ends: 137 [2020-10-16 11:45:36,442 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:45:36,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:45:36,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:45:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-16 11:45:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:36,445 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:36,445 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:36,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:36,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:36,445 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:36,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-16 11:45:36,646 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-16 11:45:36,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:36,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282502579] [2020-10-16 11:45:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:37,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282502579] [2020-10-16 11:45:37,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389065396] [2020-10-16 11:45:37,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:37,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:37,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:37,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:37,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:37,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:37,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232263590] [2020-10-16 11:45:37,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:37,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:37,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:37,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:37,146 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:38,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:38,066 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-16 11:45:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:45:38,067 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:38,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:38,068 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:45:38,068 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:45:38,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:45:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:45:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-16 11:45:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:38,071 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:38,071 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:38,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:38,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:38,072 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:38,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-16 11:45:38,280 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-16 11:45:38,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:38,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5535338] [2020-10-16 11:45:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:38,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5535338] [2020-10-16 11:45:38,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65362874] [2020-10-16 11:45:38,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:38,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:38,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:38,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:38,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:38,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:38,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:38,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:38,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126012546] [2020-10-16 11:45:38,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:38,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:38,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:38,797 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:39,918 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-16 11:45:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:45:39,919 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:39,919 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:45:39,920 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 11:45:39,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:45:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 11:45:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-16 11:45:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:39,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:39,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:39,923 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:39,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:39,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:39,924 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:40,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-16 11:45:40,128 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-16 11:45:40,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:40,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999106373] [2020-10-16 11:45:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:40,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999106373] [2020-10-16 11:45:40,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618522831] [2020-10-16 11:45:40,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:40,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:40,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:40,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30879824] [2020-10-16 11:45:40,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:40,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:40,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:40,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:40,596 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:41,614 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-16 11:45:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:45:41,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:41,615 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:45:41,616 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 11:45:41,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:45:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 11:45:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-16 11:45:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:41,619 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:41,619 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:41,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:41,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:41,620 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:41,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:41,822 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-16 11:45:41,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:41,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339297623] [2020-10-16 11:45:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:42,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339297623] [2020-10-16 11:45:42,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115417554] [2020-10-16 11:45:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:42,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:42,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:42,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:42,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:42,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:42,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:42,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513928142] [2020-10-16 11:45:42,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:42,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:42,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:42,346 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:43,576 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-16 11:45:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:45:43,577 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:43,578 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:45:43,578 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:45:43,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:45:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:45:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-16 11:45:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:43,580 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:43,581 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:43,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:43,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:43,581 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:43,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-16 11:45:43,782 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-16 11:45:43,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:43,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740743556] [2020-10-16 11:45:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:44,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740743556] [2020-10-16 11:45:44,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196079673] [2020-10-16 11:45:44,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:44,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:44,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:44,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:44,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:44,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:44,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364379369] [2020-10-16 11:45:44,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:44,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:44,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:44,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:44,240 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:45,328 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-16 11:45:45,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:45:45,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:45,330 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:45:45,330 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:45:45,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:45:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:45:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-16 11:45:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:45,333 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:45,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:45,333 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:45,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:45,333 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:45,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:45,334 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:45,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:45,534 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-16 11:45:45,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:45,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001525858] [2020-10-16 11:45:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:45,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001525858] [2020-10-16 11:45:45,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971455837] [2020-10-16 11:45:45,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:45,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:45,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:45,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:45,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:46,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:46,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:46,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78169185] [2020-10-16 11:45:46,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:46,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:46,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:46,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:46,002 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:47,292 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-16 11:45:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:45:47,293 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:47,294 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:45:47,294 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 11:45:47,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:45:47,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 11:45:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-16 11:45:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:47,297 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:47,297 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:47,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:47,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:47,297 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:47,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-16 11:45:47,502 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:47,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-16 11:45:47,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:47,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324343834] [2020-10-16 11:45:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:47,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324343834] [2020-10-16 11:45:47,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621446340] [2020-10-16 11:45:47,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:47,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:47,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:47,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:47,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:47,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:47,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369227848] [2020-10-16 11:45:47,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:47,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:47,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:47,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:47,934 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:49,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:49,056 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-16 11:45:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:45:49,058 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:49,058 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:45:49,058 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:45:49,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:45:49,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:45:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-16 11:45:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:49,062 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:49,062 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:49,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:49,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:49,063 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:49,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:49,268 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:49,268 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-16 11:45:49,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:49,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270072026] [2020-10-16 11:45:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:49,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270072026] [2020-10-16 11:45:49,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337042566] [2020-10-16 11:45:49,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:49,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:49,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:49,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:49,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:49,719 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:49,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:49,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:49,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794713501] [2020-10-16 11:45:49,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:49,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:49,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:49,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:49,740 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:51,149 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-16 11:45:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:45:51,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:51,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:51,151 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:45:51,151 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:45:51,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:45:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:45:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-16 11:45:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:51,154 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:51,154 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:51,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:51,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:51,155 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:51,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-16 11:45:51,356 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:51,356 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-16 11:45:51,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:51,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124186270] [2020-10-16 11:45:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:51,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124186270] [2020-10-16 11:45:51,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910618803] [2020-10-16 11:45:51,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:51,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:51,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:51,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934191070] [2020-10-16 11:45:51,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:51,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:51,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:51,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:51,777 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:53,004 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-16 11:45:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:45:53,005 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:53,006 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:45:53,006 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:45:53,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:45:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:45:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-16 11:45:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:53,009 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:53,009 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:53,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:53,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:53,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:53,010 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:53,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:53,210 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-16 11:45:53,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:53,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143432731] [2020-10-16 11:45:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:53,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143432731] [2020-10-16 11:45:53,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096903407] [2020-10-16 11:45:53,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:53,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:53,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:53,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:53,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:53,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:53,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:53,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53873672] [2020-10-16 11:45:53,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:53,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:53,685 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:55,326 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-16 11:45:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:45:55,327 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:55,328 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:45:55,328 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:45:55,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:45:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:45:55,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-16 11:45:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:55,331 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:55,331 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:55,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:55,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:55,331 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:55,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:55,532 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:55,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-16 11:45:55,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:55,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168268985] [2020-10-16 11:45:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168268985] [2020-10-16 11:45:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102944015] [2020-10-16 11:45:55,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:55,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:55,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:55,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:55,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:55,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:45:55,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032344017] [2020-10-16 11:45:55,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:55,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:55,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:55,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:55,980 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-16 11:45:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:57,406 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-16 11:45:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:45:57,407 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-16 11:45:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:57,408 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:45:57,408 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:45:57,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 11:45:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:45:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-16 11:45:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-16 11:45:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-16 11:45:57,411 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-16 11:45:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:57,411 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-16 11:45:57,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-16 11:45:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:57,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:57,412 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:57,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-16 11:45:57,612 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-16 11:45:57,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:57,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282806285] [2020-10-16 11:45:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:57,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282806285] [2020-10-16 11:45:57,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213275282] [2020-10-16 11:45:57,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:58,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:58,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:58,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:45:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:58,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:58,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:58,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:45:58,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333247760] [2020-10-16 11:45:58,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-16 11:45:58,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:58,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-16 11:45:58,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:45:58,081 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-16 11:45:59,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:59,784 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 11:45:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 11:45:59,785 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-16 11:45:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:59,785 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:45:59,785 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:45:59,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 11:45:59,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:45:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-16 11:45:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-16 11:45:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-16 11:45:59,788 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-16 11:45:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:59,789 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-16 11:45:59,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-16 11:45:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-16 11:45:59,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:59,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:59,789 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:59,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-16 11:45:59,990 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-16 11:45:59,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:59,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408748224] [2020-10-16 11:45:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:46:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:46:00,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408748224] [2020-10-16 11:46:00,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332515902] [2020-10-16 11:46:00,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:46:00,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:46:00,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:46:00,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-16 11:46:00,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:46:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:46:00,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:46:00,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-16 11:46:00,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713569346] [2020-10-16 11:46:00,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:46:00,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:46:00,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:46:00,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:46:00,421 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. Received shutdown request... [2020-10-16 11:46:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:46:00,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-16 11:46:00,926 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 11:46:00,929 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 11:46:00,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:46:00 BasicIcfg [2020-10-16 11:46:00,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:46:00,933 INFO L168 Benchmark]: Toolchain (without parser) took 268424.08 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 100.3 MB in the beginning and 82.1 MB in the end (delta: 18.2 MB). Peak memory consumption was 81.1 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:00,935 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 11:46:00,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 825.85 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 99.8 MB in the beginning and 161.6 MB in the end (delta: -61.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:00,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.96 ms. Allocated memory is still 203.4 MB. Free memory was 161.6 MB in the beginning and 159.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:00,936 INFO L168 Benchmark]: Boogie Preprocessor took 32.28 ms. Allocated memory is still 203.4 MB. Free memory was 159.6 MB in the beginning and 158.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:00,939 INFO L168 Benchmark]: RCFGBuilder took 457.62 ms. Allocated memory is still 203.4 MB. Free memory was 157.7 MB in the beginning and 137.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:00,942 INFO L168 Benchmark]: TraceAbstraction took 267048.59 ms. Allocated memory is still 203.4 MB. Free memory was 137.0 MB in the beginning and 82.1 MB in the end (delta: 54.9 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-10-16 11:46:00,944 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 825.85 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 99.8 MB in the beginning and 161.6 MB in the end (delta: -61.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.96 ms. Allocated memory is still 203.4 MB. Free memory was 161.6 MB in the beginning and 159.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.28 ms. Allocated memory is still 203.4 MB. Free memory was 159.6 MB in the beginning and 158.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 457.62 ms. Allocated memory is still 203.4 MB. Free memory was 157.7 MB in the beginning and 137.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 267048.59 ms. Allocated memory is still 203.4 MB. Free memory was 137.0 MB in the beginning and 82.1 MB in the end (delta: 54.9 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 488 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (92states) and FLOYD_HOARE automaton (currently 12 states, 24 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 34 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 266.9s, OverallIterations: 235, TraceHistogramMax: 10, AutomataDifference: 151.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3751 SDtfs, 13218 SDslu, 25245 SDs, 0 SdLazy, 27117 SolverSat, 15333 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13182 GetRequests, 4348 SyntacticMatches, 230 SemanticMatches, 8603 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85999 ImplicationChecksByTransitivity, 156.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 234 MinimizatonAttempts, 5969 StatesRemovedByMinimization, 233 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 5.4s SatisfiabilityAnalysisTime, 51.4s InterpolantComputationTime, 9906 NumberOfCodeBlocks, 9906 NumberOfCodeBlocksAsserted, 1229 NumberOfCheckSat, 9441 ConstructedInterpolants, 0 QuantifiedInterpolants, 926089 SizeOfPredicates, 3091 NumberOfNonLiveVariables, 30175 ConjunctsInSsa, 4016 ConjunctsInUnsatCore, 465 InterpolantComputations, 5 PerfectInterpolantSequences, 0/20310 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